The Paleo Diet (Caveman Diet)

Nutrition science continues to reveal new findings - almost daily - about healthy eating. However, some experts say all we need to do is eat like our stone age ancestors to be healthy.
The Caveman diet, also called the Paleolithic (or Paleo), Stone Age, Hunter Gatherer or Warrior Diet, is a plan based on eating plants and wild animals, similar to those cavemen are presumed to have eaten around 10,000 years ago.
Why turn back the hands of time and eat that way? The premise is that our bodies are genetically programmed to eat like our Paleolithic ancestors.
Proponents claim it's the biologically appropriate diet that suits us best, with the proper balance of nutrients to promote health and reduce the incidence of chronic diseases.

Paleo (Caveman) diet: What supporters say

Eating like our ancient ancestors, is healthy says Professor Loren Cordain, author of The Paleo Diet. He says: "Clinical trials have shown that the Paleo diet is the optimum diet that can lower the risk of cardiovascular disease, blood pressure, markers of inflammation, help with weight loss, reduce acne and promote optimum health and athletic performance."
Supporters of this nutritional approach have published papers and books and created web sites, to promote it. They argue that today's typical Western diet is responsible for the epidemic levels of obesity, heart disease, diabetes and other health problems.
The Paleo or Caveman diet is not without controversy. Some nutrition experts assert that humans have adapted to a broader diet, including whole grains, dairy products and legumes. Others question the evidence for the diet’s evolutionary logic.
Even though grains and dairy seem healthy, Professor Cordain says our "genome has not really adapted to these foods, which can cause inflammation at the cellular level and promote disease".

The Caveman diet: What you can eat

The diet is based on the foods that could be hunted, fished and gathered during the Paleolithic era - meat, fish, shellfish, eggs, tree nuts, vegetables, roots, fruits and berries.
However, a true paleolithic diet is impossible to mimic because wild game is not readily available and most modern plant food is cultivated rather than wild and meats are domesticated.
At best, you can eat a modified version of the original diet that's gluten-free and includes lean meat, organ meats, fish, poultry, eggs, vegetables, fruit and nuts.
You won’t find any dairy, grains, sugar, legumes, potatoes, processed oils or any foods that were grown after agriculture started.
On this diet you'd skip salt and any drinks other than water, coconut water or organic green tea.
You can satisfy your sweet tooth with raw honey or coconut palm sugar, but only in limited quantities.
Some versions of the plan encourage fasting, eating raw foods and eliminating "nightshade" vegetables (tomatoes, aubergine).
Some plans allow a little flexibility, like adding some processed oils from fruits and nuts, such as olive and flaxseed oil.
Supporters suggest eating organic plant foods, wild-caught fish and grass-fed meats because they're closer to the nutritional quality of the foods of our ancestors.

The Caveman diet: How it works

Supporters of the Paleo diet say people are genetically programmed to eat like cavemen did before the agricultural revolution. They also say it's a way to cut the spiralling cases of obesity, diabetes, heart disease and other chronic conditions.
That's because a diet rich in lean protein and plant foods contains fibre, protein and fluids that work together to satisfy, control blood sugar and prevent weight gain and type 2 diabetes.
You may not need to eat this way all the time. According to Professor Cordain, eating like our ancestors 80% of the time offers health benefits. He suggests trying the diet for two weeks to see if you feel better on the plan.
The plan also encourages people to be physically active on a regular basis. After all, hunter-gathers had active daily lives seeking food, water and shelter.

The Caveman diet: Experts' views

Nutrition experts have been clamouring for years for a cleaner diet based on whole foods, lean meats, fruits, vegetables and less sugar, sodium and processed foods.

However, they also typically include low-fat dairy, legumes and whole grains, based on the wealth of research that supports the role of these foods in a healthy, well-balanced diet.

Dr Áine O'Connor, nutrition scientist with the British Nutrition Foundation tells us: "The Paleo or paleolithic diet has some positive aspects in that lean meats, fruits, vegetables and foods containing less sugar and salt are encouraged, but it has limitations, namely by excluding certain food groups such as milk and dairy foods, which can lead to nutrient deficiencies in the long term.
"Overall, the Paleo diet is not sustainable due to lack of variety and the potential for nutrient deficiencies."
The British Dietetic Association refers to the Caveman diet as a fad diet. It says it comes in several variations but, in general, is based on eating one main meal per day between the hours of five and seven in the evening, when hunters are thought to have come back with the goods. The remainder of the day involves grazing on foods such as nuts and dried fruit.

It says the key to losing weight and maintaining weight loss long term is having regular meals and cautions that nuts and dried fruits, though high in nutrients, are also high in energy (calories) that can add up.
David Katz, author of Way to Eat, says eating more foods direct from nature is far better than the diet most people typically eat, but adds: "How the Paleo-type diet compares in terms of long-term outcomes to an Asian, Mediterranean, vegan or other optimised diet, we just don’t know."

The Caveman diet: Food for thought

A diet that includes whole, unprocessed foods is the basis of most healthy diet recommendations, but so are whole grains, low-fat dairy and legumes.
Including these food groups will help meet nutritional needs and contribute to a well-balanced diet plan. You can satisfy dietary requirements without these foods but that requires careful planning and supplementation.
If the Paleo or Caveman diet appeals to you, consider supplementing the plan with calcium and vitamin D after speaking to your GP or a registered dietitian.
Eliminating all grains, dairy, processed foods and sugar will probably lead to weight loss but it may be tough to follow this plan long term due to the diet's restrictive nature.


 

By Kathleen M. Zelman, MPH, RD, LD
WebMD Feature

Medically Reviewed by Dr Rob Hicks

Kathleen Zelman is director of nutrition for WebMD. Her opinions and conclusions are her own.

 

SOURCES:
Heather Mangieri, MS, RD, American Dietetic Association spokeswoman; owner, Nutrition Check Up.
Keith Ayoob, EdD, RD, associate professor, Albert Einstein College of Medicine.
Dr David Katz, MPH, director, Prevention Research Center, Yale University School of Medicine; author, What to Eat.
Loren Cordain, PhD, author, The Paleo Diet; professor, Colorado State University.
Eaton, S. Proceedings of the Nutrition Society, February 2006; vol 65: pp 1-6.
The British Dietetic Association.
Dr Áine O'Connor Nutrition Scientist, The British Nutrition Foundation.

Reviewed on January 11, 2012

© 2012 WebMD, LLC. All rights reserved.

 

10 diet rules meant to be broken

Some food dos and don'ts are best ignored, experts say.

WebMD Medical Reference

Medically Reviewed by Dr Rob Hicks

Do these diet truisms ring any bells in your mind?:

• Don't eat before bedtime or you'll gain weight.
• Missing meals will help you lose the pounds.
• If you want to stay on a diet, eat at the same time every day.

Experts say these are among dozens of silly food 'rules' we often try to follow to the letter. Some are half-truths, some are complete myths, and some are clearly more harmful than others, but most of them won't help you lose weight or make dieting any easier.

10 food rules to ignore

 

1. Eating at night will pile on the pounds.
It's the total calories you consume over a 24-hour period - and more often, over a week - that causes you to gain weight, and when you eat those calories doesn't matter. That said, because you may be more tired at night, your resolve may be lower, so you may tend to eat larger portions, or more high-calorie foods, than you would during the day. But as long as you keep an eye on calories and portion size, feel free to set your hunger alarm to the time that suits your lifestyle.

2. It's best to eat at the same times every day.
Eating when you're hungry rather than when the clock says it's time to eat is a better strategy than eating at the same time every day. While it can help to keep some consistency to mealtimes, forcing yourself to eat when you're not hungry - or forcing yourself to wait when you are - only makes it harder to stick to your diet. If you must eat at a certain time,  for example, during a set lunch break at work - cut yourself some slack the rest of the day and eat only when your stomach says it's time.

3. Dieting with a friend always makes weight loss easier.
No one doubts that companionship and common goals can pay off for dieters. But there are some instances in which the buddy system may work against you and your friend.
If one friend fails and the other doesn't, it could upset the balance. Also if one friend falls off the diet wagon, the other may follow suit. Ultimately, weight loss is a personal journey. If you find it's easier with a friend, remember to compete only against yourself - not each other.

4. Dietary fat keeps you feeling full longer, so you'll eat less.
This was a well-accepted food rule for many years but new research has challenged this logic. It has shown that while fat does take longer to digest, it's actually the least satiating of any food group so it won’t help you control your appetite. The foods likely to stave off hunger the longest are protein foods, followed by carbohydrates, then fats.

5. When you disrupt your diet, you might as well wait until the next day to get back on track.
Nothing could be farther from the truth. Every meal matters, so if you ate a big piece of birthday cake at lunch time, you can still get back on track with your next meal. You don't have to have a full day of healthy eating in order for it to count.

6. Refusing food at a party or when visiting is rude.
If you had diabetes, or a severe food allergy to something, you wouldn't think twice about turning down food you weren't sure of - and you should feel that same sense of priority in turning down a food that you know will disrupt your diet - most people will understand.

7. Missing a meal every now and then will help you lose weight.
Missing a meal means you will be so hungry at the next meal that you are likely to overeat, say experts.  Not only that, missing meals can actually help lead to a slowdown of your metabolism, meaning you'll burn fewer calories.

8. Bread is fattening, nuts are fattening, pasta is fattening.
It's not what you eat that contributes to weight gain, it's how much you eat that matters most.
Whole wheat bread, for example, is a great source of nutrients, and it won't make you gain weight more than any other food with the same number of calories.

9. All calories are equal.
While it's true that 1,400 calories is 1,400 calories, experts say certain foods have a greater ability to fill you up before they fill you out. These tend to be fibre-rich, water-rich foods, like fruit, vegetables, and whole grains.
All calories are equal if all you're doing is counting calories to lose weight but if you care about how you are losing weight, or controlling your hunger, or the health of your body, then all calories are not of equal value.

10. If you don't clean your plate, you're wasting food.
Tying emotions to eating (like when you feel guilty about leaving food on your plate) sets the stage for emotional overeating. If you've been taught that cleaning your plate is the best way to show appreciation for a meal, consider showing your gratitude with verbal praise instead.
Food is simply a source of fuel for the body - not an emotional payoff or payment. If you don't feel right leaving the table until you've cleaned your plate, put less food on your plate to begin with.

SOURCES: Elizabeth Somer, MA, RD, author, 10 Habits That Mess Up a Woman's Diet. Abby Aronowitz, PhD, author, Your Final Diet; director, SelfHelpDirectives.com; Samantha Heller, MS, RD, senior clinical nutritionist, New York University Medical Center, USA.

Reviewed on February 20, 2012

© 2012 WebMD, LLC. All rights reserved.

Top 10 Diets Review

With so many diet options to choose from it can be hard to find a weight loss plan that’s right for you. 

To help, the British Dietetic Association (BDA) looks at the pros and cons and gives its verdict on the 10 most searched-for commercial diets.

Dukan diet

The Dukan diet is a low-carbohydrate (carb), high-protein diet. There’s no limit to how much you can eat during the plan’s four phases, providing you stick to the rules of the plan. During phase one, you’re on a strict lean protein diet. This is based on a list of 72 reasonably low-fat protein-rich foods, such as chicken, turkey, eggs, fish and fat-free dairy. This is for an average of five days to achieve quick weight loss. Carbs are off limits except for a small amount of oat bran. Unlike the Atkins diet, Dukan’s phase one bans vegetables and seriously restricts fat. The next three phases of the plan see the gradual introduction of some fruit, veg and carbs and eventually all foods. The aim is gradual weight loss of up to 2lb a week and to promote long-term weight management. There’s no time limit to the final phase, which involves having a protein-only day once a week and taking regular exercise.
Pros:
You can lose weight very quickly, which can be motivating. It’s a very strict and prescriptive diet and some people like that. It’s easy to follow. You don’t need to weigh food or count calories. Apart from keeping to low-fat, low-salt and high-protein foods, there’s no restriction on how much you can eat during your first two weeks.
Cons:
At the start of the diet you may experience side effects such as bad breath, a dry mouth, tiredness, dizziness, insomnia and nausea from cutting out carbs. The lack of wholegrains, fruit and veg in the early stages of the diet could cause problems such as constipation.
BDA verdict:
Rapid weight loss can be motivating but it is unsustainable and unhealthy. The Dukan diet isn’t nutritionally balanced, which is acknowledged by the fact that you need a vitamin supplement and a fibre top up in the form of oat bran. There’s a danger this type of diet could increase your risk of long-term health problems if you don’t stick to the rules. The diet lacks variety in the initial phases so there’s a risk you’ll get bored quickly and give up.

Atkins diet

The Atkins diet is a low-carb, high-protein weight loss programme. You start with a low-carb diet designed for rapid weight loss. This lasts at least two weeks depending on your weight loss goal. During this phase, you’re on a protein, fat and very low-carb diet, including meat, seafood, eggs, cheese, some veg, butter and oils. In contrast to the Dukan diet, Atkins allows unlimited fat and some veg, such as peppers, cucumber and iceberg lettuce, during phase one. During the next three phases, the weight loss is likely to be more gradual, and regular exercise is encouraged. More carbs, fruit and veg are introduced to your diet with the aim of working out what your ideal carb intake is to maintain a healthy weight for life. Phase one is designed to help you lose up to 15lb in two weeks, reducing to 2lb to 3lb during phase two.
Pros:
You can lose weight very quickly, which can be motivating. The diet also encourages people to cut out most processed carbs and alcohol. With its diet of red meat, butter, cream, cheese and mayonnaise, it’s one of the few diets out there that appeals to men. 
Cons:
Initial side effects can include bad breath, a dry mouth, tiredness, dizziness, insomnia, nausea and constipation from cutting out carbs and fibre. The high intake of saturated fat may increase your risk of heart disease and there are concerns that a lack of fruit, veg and dairy products and a high protein intake may affect bone and kidney health in the long term.
BDA verdict:
Rapid weight loss can be motivating but it is unsustainable. The Atkins diet isn’t nutritionally balanced. By limiting fruit and veg it contradicts all the advice on healthy eating that we have tried so hard to pass on to people. The meal choices are limited so there’s a risk many people will get bored quickly and drop out or take a ‘pick and mix’ approach.

Cambridge diet

The Cambridge Weight Plans are based around buying and eating a range of meal-replacement products with the promise of rapid weight loss. There are six flexible diet plans ranging from 415kcal to 1,500kcal or more a day, depending on your weight loss goal. There is also a long-term weight management programme. The bars, soups, porridges and shakes can be used as your sole source of nutrition or together with low-calorie regular meals. While on the programme, you receive advice and support on healthy eating and exercise from a Cambridge adviser.
Pros:
Many people on very low-calorie diets (VLCDs) find the weight loss to be sudden and quite dramatic. The meal replacements are all nutritionally balanced so you're likely to be getting all the vitamins and minerals you need albeit not from real food.
Cons:
Initial side effects can include bad breath, a dry mouth, tiredness, dizziness, insomnia, nausea and constipation from cutting down on carbs and fibre. The hardest part of the plan is sticking to it. Giving up normal meals and swapping them for a snack bar or a shake can be boring and feel socially isolating. This isn’t a plan you can stick to in the long term.
BDA verdict:
You need to like the meal-replacement products to stay with the plan. Rapid weight loss can be motivating but it is unsustainable. A VLCD that involves eating 1,000 calories a day or fewer should not be followed for more than 12 continuous weeks. If you are eating fewer than 600 calories a day, you should have medical supervision.

South Beach Diet

The South Beach Diet is a low-GI diet originally developed for heart patients in the US. There’s no calorie counting and no limits on portions. You're encouraged to eat three meals and two snacks a day and follow an exercise plan. People who have more than 10lb to lose start with phase one. This is a two-week quick weight loss regime where you eat lean protein, including meat, fish and poultry, as well as some low-GI vegetables and unsaturated fats. Low-GI carbs are re-introduced during phases two and three, which encourage gradual and sustainable weight loss.
Pros:
If you can avoid phase one and start on phase two, there are fewer dietary restrictions in the rest of the plan than some other popular diets. After phase one, the diet broadly follows the basic principles of healthy eating. No major food groups are eliminated and plenty of fruit, veg and low-GI carbs are recommended.
Cons:
The severe dietary restrictions of phase one may leave you feeling weak and missing out on some vitamins, minerals and fibre. You may initially experience side effects such as bad breath, a dry mouth, tiredness, dizziness, insomnia, nausea and constipation.
BDA verdict:
The first two weeks are the most difficult to get through. We’re concerned that this diet promises such a large weight loss, up to 13lb, in the first two weeks. This, though, won't be all fat. Some of the weight loss will include water and carbs - both of which will be replaced when you begin eating more normally. Once you get past the initial phase, the diet follows the basic principles of healthy eating and should provide the nutrients you need to stay healthy.

Slimming World diet

Slimming World’s weight loss plan encourages you to swap high-fat foods for low-fat foods that are naturally filling. You choose your food from a list of low-fat foods they call 'Free Foods', such as fruit, vegetables, pasta, potatoes, rice, lean meat, fish and eggs, which you can eat in unlimited amounts. There’s no calorie counting, no foods are banned and you’re still allowed the occasional treat. You can get support from fellow slimmers at weekly group meetings and follow an exercise plan to become gradually more active. The plan is designed to help you lose about 1lb to 2lb a week.
Pros:
No foods are banned so meals offer balance and variety and are family-friendly. The portion size from each food group will vary depending which plan you follow. The 'Body Magic' booklet they provide gives ideas to help you raise your activity levels. Meeting as a group can provide valuable support.
Cons:
Slimming World doesn’t educate you about calories. Without having learned about calories and portion sizes, you may struggle to keep the weight off in the long term when you come off the programme.
BDA verdict:
The group meetings encourage members to share successes, ideas and recipes with each other but they may not appeal to everyone. While the meal plans may lack some flexibility, they are generally balanced. However, without learning about calories and portion sizes, you may struggle to make healthy choices once you’ve left the programme.

Slim-Fast diet

The Slim-Fast diet is a low-calorie meal replacement plan for people with a BMI of 25 and over. It uses Slim-Fast’s range of products. The plan recommends three snacks a day from an extensive list, including crisps and chocolate, two meal replacement shakes or bars and one regular meal, taken from a list of recipes on the Slim-Fast website. You can stay on the diet for as long as you want depending on your weight loss goal. Once reached, you’re advised to have one meal replacement shake a day, up to two low-fat snacks and two healthy meals. The plan is designed to help you lose about 1lb to 2lb a week and you can follow the diet for as long as you want.
Pros:
Meal-replacement diets can be effective at helping some people to lose weight and keep it off. The plan is convenient as the products take the guesswork out of portion control and calorie counting. No foods are forbidden although you are encouraged to eat lean protein, fruit and vegetables.
Cons:
On their own, meal-replacement diets do little to educate people about their eating habits and change their behaviour. There’s a risk of putting the weight back on again once you stop using the products. You may find it hard to get your 5 a day of fruit and veg without careful planning.
BDA verdict:
If you don’t like the taste of the meal replacement products, you won't stay with the plan. The Slim-Fast plan can be useful to kickstart your weight loss regime, but it’s important that you make full use of the online support to learn about the principles of healthy eating and how to manage everyday food and drink.

LighterLife diet

The LighterLife weight loss plans combine a very low-calorie meal-replacement diet with weekly counselling. With LighterLife Total, for people with a BMI of 30 or more, you eat four 'food packs' a day, consisting of shakes, soups, mousses or bars, and no conventional food. LighterLife Lite, for those with a BMI of 25-30, involves eating three food packs a day plus one meal from a list of approved foods. You stay on the plans until you reach your target weight. The meal plans can lead to very rapid weight loss and you’re advised to see your GP before starting. How long you stay on the diet depends on how much weight you have to lose.
Pros:
The counselling can help you understand your relationship with food, so hopefully you can make lasting changes to keep the weight off for good. With the meal replacements, there’s no weighing or measuring, so it’s a hassle-free approach to weight loss.
Cons:
Initial side effects of the diet can include bad breath, a dry mouth, tiredness, dizziness, insomnia, nausea and constipation from cutting down on carbs and fibre. Surviving on a strict diet of shakes and soups and other meal replacements isn’t much fun and can feel socially isolating.
BDA verdict:
Rapid weight loss can be motivating but it is unsustainable. LighterLife’s VLCD and its counselling component may work for some, particularly people who have struggled to lose weight for years, have health problems as a result of their weight and are clinically obese with a BMI of more than 30. A VLCD that involves eating 1,000 calories a day or fewer should not be followed for more than 12 continuous weeks. If you are eating fewer than 600 calories a day, you should have medical supervision.

WeightWatchers diet

The WeightWatchers plan is based on the ProPoints system, which gives a value to foods and drink based on protein, carbs, fat and fibre content. It is essentially a calorie-controlled diet where you get a personal daily ProPoints allowance, which you can use how you like. There’s no limit on the amount of fruit and most veg you can eat. You also get a weekly ProPoints safety net in case you go over your allowance, and an individual exercise plan. The weekly meetings and confidential weigh-ins provide support and extra motivation to encourage long-term behaviour change. The plan is designed to help you lose up to 2lb a week.
Pros:
No foods are banned so you can eat and drink what you want providing you stick to your points allowance. The ProPoints system is easier to follow for some than calorie-counting and less restrictive than other plans. This is because it introduces a safety net of points, which can be saved up for a special occasion, such as a night out, a small amount of alcohol or treats.
Cons:
When you begin, working out the points system can be just as time consuming as simply counting calories. Some people feel pressured into purchasing WeightWatchers branded foods.
BDA verdict:
The ProPoints plan is generally well balanced and can be a foundation for long-term changes in dietary habits. The support group approach can help keep people motivated and educate them about healthy eating. But it’s vital that you make the connection between the points system and calories if you want to avoid putting the weight back on once you leave the programme.

Rosemary Conley diet

Rosemary Conley’s Diet and Fitness plans combine a low-fat, low-GI diet with regular exercise. You can follow her recipes or buy from her range of calorie-controlled ready meals and snacks. You’re encouraged to eat food with 5% or less fat, with the exception of oily fish, porridge oats and lean meat. A network of local Rosemary Conley clubs offers weekly exercise classes, support and motivation. You learn about calorie counting and portion size, which can help you sustain your weight loss beyond the programme. The diet is designed to help you lose a stone in seven weeks. How long you stay on the plan depends on your weight loss goal. 
Pros:
The programme is based around calories, with a focus on cutting fat. The 'portion pots', which are used to measure foods such as rice, cereal, pasta and baked beans, teach you about portion control. Physical activity is an integral part of the weight loss plan, with exercise sessions suitable for all ages, sizes and abilities offered at their weekly classes with trained leaders.
Cons:
Some low-fat products aren't necessarily more healthy because they can still be high in sugar and calories. It is unrealistic to expect people to go out with their portion pots and, therefore, portion control may be more tricky away from the home.
BDA verdict:
The diet and exercise plans offer a balanced approach to weight loss that teaches you about portion size, the importance of regular exercise for weight management and making healthier choices. The educational element is very useful for long-term weight management once you have left the programme.

Jenny Craig diet

The Jenny Craig programme has three main features: one-to-one support, a meal delivery service and tailored exercise plans. The weekly, personalised telephone consultations provide advice, motivation and support. The diet adviser assesses your reasons for gaining weight and, over the course of the programme, helps you to change your behaviour. The meals and snacks are packed into single-sized portions to suit your weight-loss needs. You need to add certain fresh fruits, veg and low-fat dairy products. The programme is designed to help you lose between 1lb and 2lb a week until you reach your target weight.
Pros:
All the meals, including snacks, are calorie-counted, portion-controlled and delivered to your door. You eat real food, receive telephone support and learn about portion size, calories and exercise, which can all help you make healthier choices beyond the programme.
Cons:
The meals don’t contain fruit, veg or dairy, which will be an additional expense. This isn’t an approach that you can stick to in the long term so it’s vital to learn how to prepare or choose healthy food yourself rather than relying on someone else.
BDA verdict:
If you don’t like the Jenny Craig meals then this diet won’t work for you. If you want a diet where most of the work is done for you then the Jenny Craig programme can be a good solution. The concern with pre-packaged meals is whether dieters will realise there is no magic trick and be able to replicate the meals, with the same portion sizes and calories, once they are on their own.


Article Source:

http://www.nhs.uk/Livewell/loseweight/Pages/top-10-most-popular-diets-review.aspx

Keeping The Weight Off

If you've recently lost excess weight, congratulations! It's an accomplishment that will likely benefit your health now and in the future. Now that you've lost weight, let's talk about some ways to maintain that success.
The following tips are some of the common characteristics among people who have successfully lost weight and maintained that loss over time.¹

• Watch Your Diet
• Be Active
• Stay on Course

Watch Your Diet

• Follow a healthy and realistic eating pattern. You have embarked on a healthier lifestyle, now the challenge is maintaining the positive eating habits you've developed along the way. In studies of people who have lost weight and kept it off for at least a year, most continued to eat a diet lower in calories as compared to their pre-weight loss diet.² 
• Keep your eating patterns consistent. Follow a healthy eating pattern regardless of changes in your routine. Plan ahead for weekends, vacations, and special occasions. By making a plan, it is more likely you'll have healthy foods on hand for when your routine changes.
• Eat breakfast every day. Eating breakfast is a common trait among people who have lost weight and kept it off. Eating a healthful breakfast may help you avoid getting "over-hungry" and then overeating later in the day.

Be Active

• Get daily physical activity. People who have lost weight and kept it off typically engage in 60—90 minutes of moderate intensity physical activity most days of the week while not exceeding calorie needs. This doesn't necessarily mean 60—90 minutes at one time. It might mean 20—30 minutes of physical activity three times a day. For example, a brisk walk in the morning, at lunch time, and in the evening. Some people may need to talk to their healthcare provider before participating in this level of physical activity.

Stay on Course

• Monitor your diet and activity. Keeping a food and physical activity journal can help you track your progress and spot trends. For example, you might notice that your weight creeps up during periods when you have a lot of business travel or when you have to work overtime. Recognizing this tendency can be a signal to try different behaviors, such as packing your own healthful food for the plane and making time to use your hotel's exercise facility when you are traveling. Or if working overtime, maybe you can use your breaks for quick walks around the building.
• Monitor your weight. Check your weight regularly. When managing your weight loss, it's a good idea to keep track of your weight so you can plan accordingly and adjust your diet and exercise plan as necessary. If you have gained a few pounds, get back on track quickly.
• Get support from family, friends, and others. People who have successfully lost weight and kept it off often rely on support from others to help them stay on course and get over any "bumps." Sometimes having a friend or partner who is also losing weight or maintaining a weight loss can help you stay motivated.

Want to learn more?

Improving Your Eating Habits
Your eating habits may be leading to weight gain; for example, eating too fast, always clearing your plate, eating when you not hungry and skipping meals (or maybe just breakfast).
Physical Activity for a Healthy Weight
Regular physical activity is important for good health, and it's especially important if you're trying to lose weight or to maintain a healthy weight.

References

¹National Weight Control Registry The National Weight Control Registry (NWCR) was developed to identify and investigate the characteristics of individuals who have succeeded at long-term weight loss. The NWCR is tracking over 5,000 individuals who have lost significant amounts of weight and kept it off for long periods of time.
²Wing RR, Phelan S. Long-term weight loss maintenance. Am J Clin Nutr 2005;82(suppl):222S-5S.

Resources: Centers For Disease Control & Prevention http://www.cdc.gov 

Does the 5:2 intermittent fasting diet work?

Note – this article, originally written in January 2013, was updated in May 2013.

The 5:2 diet is an increasingly popular diet plan with a flurry of newspaper articles and books being published on it in the run up to Christmas 2012 and in January 2013.
The diet first reached the mainstream via a BBC Horizon documentary called Eat, Fast and Live Longer, broadcast in August 2012.
The 5:2 diet is based on a principle known as intermittent fasting (IF) – where you eat normally at certain times and then fast during other times.
The 5:2 diet is relatively straightforward – you eat normally five days a week, and fast on the other two days.

Champions of the 5:2 diet claim that other than helping people lose weight, 5:2 diet can bring other significant health benefits, including:

• increased life-span
• improved cognitive function and protection against conditions such as dementia and Alzheimer’s disease
• protection from disease

However the body of evidence about 5:2 diet and intermittent fasting is limited when compared to other types of weight loss techniques.

What we don’t know about intermittent fasting

Despite its increasing popularity, there is a great deal of uncertainty about IF with significant gaps in the evidence.
For example, it is unclear:

• what pattern of IF is the most effective in improving health outcomes – 5:2, alternative day fasting, or something else entirely different
• what is the optimal calorie consumption during the fasting days – the 5:2 diet recommends 500 calories for women and 600 for men, but these recommendations seem arbitrary without clear evidence to support them
• how sustainable is IF in the long-term – would most people be willing to stick with the plan for the rest of their lives?

Are there any side-effects from intermittent fasting?

Little is known about possible side-effects as no systematic attempt has been made to study this issue. Anecdotal reports of effects include:

• difficulties sleeping
• bad breath (a known problem with low carbohydrate diets)
• irritability
• anxiety
• dehydration
• daytime sleepiness

However, more research would be needed to confirm these side-effects and their severity.
If you are fasting, you may want to think about how fasting will impact on your life during your fasting days. You are likely to be very hungry and have less energy and this could affect your ability to function (such as at work), in particular it may affect your ability to exercise which is an important part of maintaining a healthy weight.
Also, IF may not be suitable for pregnant women and people with specific health conditions, such as diabetes, or a history of eating disorders.
Because it is a fairly radical approach to weight loss, if you are considering trying IF for yourself, it is wise to speak to your GP first to see if it is safe to do so.

Evidence about the 5:2 diet

Despite its popularity evidence directly assessing the 5:2 model of intermittent fasting is limited.
But since this article was originally written in January 2013 we have been alerted to research, led by Dr Michelle Harvie, which did look at the 5:2 model.
In one study carried out in 2010 the researchers did find that women placed on a 5:2 diet achieved similar levels of weight loss as women placed on a calorie controlled diet.
They also experienced reductions in a number of biological indicators (biomarkers) that suggest a reduction in the risk of developing chronic diseases such as type 2 diabetes.
A further study in 2012 suggested that the 5:2 model may help lower the risk of certain obesity-related cancers, such as breast cancer.
The increasing popularity of the 5:2 diet should lead to further research of this kind.

Evidence about other forms of IF

There is some degree of evidence about the potential benefits of other forms of IF – albeit with some limitations.
It should be stressed that our assessment of the evidence was confined to entering a number of keywords into Google Scholar and then looking at a small number of studies which we felt would be useful to explore further.
We did not carry out a systematic review (though arguably, it would be useful for researchers to do so). So the information provided below should be taken in the spirit of us trying to provide an introduction to some of the evidence and science of IF – not an exhaustive 'last word' on the topic.

Is there any evidence that intermittent fasting aids weight-loss?
One of the most recent pieces of research on intermittent fasting is a 2012 study which recruited 30 obese women known to have pre-existing risk factors for heart disease.
After an initial two week period they were then given a combination diet of low calorie liquid meals for six days of a week (similar to Slim Fast diet products) and then asked to fast for one day a week (comsuming no more than 120 calories).
After eight weeks, on average, the women lost around 4kg (8.8lb) in weight and around 6cm (2.3 inches) off their waist circumference.
However, there are a number of limitations to consider when looking at this as evidence that it might be a generally beneficial thing to do for most ordinary people, including that:

• These women may have had increased motivation to stick with the diet because they knew their weight would be monitored (this is a psychological effect that slimming clubs make use of).
• The women had been told that they were at risk of heart disease. It is uncertain how well most of us would cope with such as extreme diet.
• The follow-up period was short – just two months. It is not clear whether this diet would be sustainable in the long-term or whether it could cause any side effects.
• 30 people is quite a small sample size. A much larger sample – including men – is required to see if intermittent fasting would be effective in most overweight or obese people.

Is there any evidence intermittent fasting increases life-span?
There is quite a wide range of work on the effects of IF on combating the effects of aging, but almost all of these studies involved either rats, mice or monkeys. One big problem with studies in animals – particularly rodents – is that they are only expected to live for a few years, this makes them ideal subjects for longevity studies. However, to carry out similar, more useful experiments in humans, requires decades-long research to gain credible results.
In an unsystematic look at the evidence, we find only one study involving humans: a 2006 review of an experiment actually carried out in 1957 in Spain.
In this 1957 study, 120 residents of an old people’s home were split into two groups (it is unclear from the study whether this was done at random). The first group (the control group) ate a normal diet. The second group (the IF group) ate a normal diet one day and then a restricted diet (estimated to be around 900 calories) the next.
After three years there were 13 deaths in the control group and only six deaths in the IF group.
This study is again limited by the small sample size meaning that the differences in death are more likely to be the results of a statistical fluke. Also, many experts would feel uneasy about issuing dietary guidelines based on a study over half a century old with unclear methods. It is unlikely that this experiment could be repeated today – denying food to elderly people in residential care is unlikely to be looked at kindly by an ethics committee.

Is there any evidence intermittent fasting prevents cognitive decline?
It seems that all of the studies on the supposed protective effects of IF against conditions that can cause a decline in cognitive function (such as dementia or Alzheimer’s disease) involve animals.
For example, a 2006 study involved mice that had been genetically engineered to develop changes in brain tissue similar to those seen in people with Alzheimer’s disease.
Mice on an IF diet appeared to experience a slower rate of cognitive decline than mice on a normal diet (cognitive function was assessed using a water maze test).
While the results of these animals tests are certainly intriguing, animal studies have inherent limitations. We can never be sure that the results will be applicable in humans.

Is there any evidence intermittent fasting prevent diseases?
Much of the published research into the potential preventative effects of IF involve measuring biological markers associated with chronic disease, such as insulin-like growth factor-I (IGF-I) – known to be associated with cancer.
Using these kinds of biological surrogates is a legitimate way to carry out research, but they do not guarantee successful real-world outcomes.
For example, some medications that were found to lower blood-pressure readings taken in laboratory conditions failed to prevent strokes once they had been introduced for use in the healthcare of patients in the world.
A 2007 clinical review looking at the effects of IF in humans in terms of ‘real-world’ health outcomes concluded that IF (specifically, alternative day fasting) may have a protective effect against heart disease, type 2 diabetes and cancer. However, it concluded ‘more research is required to establish definitively the consequences of ADF (alternative day fasting)’.

Conclusion

Compared to other types of weight loss programmes the evidence base of the safety and effectiveness of the 5:2 diet is limited.
If you are considering it then you should first talk to your GP to see if it is suitable for you. Not everyone can safely fast.
Other methods of weight loss include:

• eating a healthy balanced diet with at least five portions of fruit and vegetables a day
• taking regular exercise
• quitting smoking if you smoke
• drinking alcohol in moderation

Article Created & Edited by NHS Choices  http://www.nhs.uk/news/Pages/NewsIndex.aspx.

Links to the headlines

The power of intermittent fasting. BBC News, August 5 2012
The 5:2 diet: can it help you lose weight and live longer? The Daily Telegraph, August 16 2012

Links to the science

Harvie M, Howell A. Energy restriction and the prevention of breast cancer. Proceedings of the Nutrition Society. Published online March 12 2012
Harvie M, Pegington M, Mattson MP, et al. The effects of intermittent or continuous energy restriction on weight loss and metabolic disease risk markers: a randomised trial in young overweight women. International Journal of Obesity. Published online October 5 2010
Kroeger CM, Klempel MC, Bhutani S, et al. Improvement in coronary heart disease risk factors during an intermittent fasting/calorie restriction regimen: Relationship to adipokine modulations (PDF, 291.4Kb). Nutrition & Metabolism. Published online October 31 2012
Johnson JB, Laub DR, John S. The effect on health of alternate day calorie restriction: Eating less and more than needed on alternate days prolongs life (PDF, 64.66Kb). Medical Hypothesis. Published online 2006
Halagappa VKM, Guo Z, Pearson M, et al. Intermittent fasting and caloric restriction ameliorate age-related behavioral deficits in the triple-transgenic mouse model of Alzheimer's disease (PDF, 843.1Kb). Neurobiology of Disease. Published online January 13 2007
Varady KA, Hellerstein MK, et al. Alternate-day fasting and chronic disease prevention: a review of human and animal trials (PDF, 118.6KB). American Journal of Clinical Nutrition. Published online 2007 

How to keep weight off

If you've achieved your target weight, well done! But don't undo all the good work by reverting to old habits.

The effects of quick-fix diets often don't last, as many people fall back into old eating and activity habits after the weight is lost. If you find your weight is going back up again, it's time to take action.

How to keep weight off

The key to reaching your ideal weight and then keeping weight off is to make long-term changes to your diet and lifestyle that you can stick to for life.

The following tips are likely to help keep weight off:

• Stick to lower-calorie eating. A lower-fat, higher-protein diet has been shown to help maintain weight loss for some people. This could be because protein-rich meals make you feel fuller more quickly, making you less likely to snack between meals.
• Plan ahead. Maintain your healthier eating habits regardless of changes in your routine, such as eating out, weekends or holidays. By planning ahead, you're less likely to slip up.
• Eat breakfast. Research shows that breakfast can help people control their weight. Having breakfast can help you avoid getting too hungry and snacking later on.
• Stay active. Build up your physical activity levels. So if you’ve already been walking regularly, think about walking for longer, or start running.
• Watch your weight. Weigh yourself regularly so you can keep a close eye on any changes to your weight.
• Get support. If you have talked to a health professional about your weight in the past, make sure you go back regularly to get support from them.
• Keep it interesting. Variety is the spice of life, so if you feel yourself slipping back into old ways, mix things up a bit. Buy a new healthy cookbook, sign up for a healthy cooking course or try a new activity.
• Set yourself goals. These can help to motivate you into keeping up your healthy diet and exercise regime. For example, is there a special occasion coming up that you want to feel your best for? 

 

What should I eat now?

As a guide, the average man needs about 2,500 calories and the average woman needs 2,000 calories a day to maintain their weight. If you’ve been eating a lower calorie diet and you've now reached a healthy weight, you may want to increase your calorie intake. But do it by small amounts to avoid putting on weight again and remember to keep active.

More weight to lose?

“When we look at people who lose weight successfully, the lessons are clear,” says Dr Andrew Brewster, a GP with a special interest in obesity and weight management. “A combination of diet changes and changes to their level of physical activity is the best method. The key is making small changes that you can keep for life, rather than drastic changes that you only stick to for a few weeks.

“You don’t need to achieve a healthy weight overnight. Losing even a few kilos can make a huge difference to the health of someone who is overweight.”

You can check the weight range that is healthy for you by using our Healthy weight calculator Set a realistic target. Give yourself enough time to work towards your goal – the safe rate of weight loss is between 1lb and 2lb (0.5kg and 1kg) a week.

Download the new NHS 12-week weight loss guide.

 

Healthy food swaps

To start, you might decide to swap just one high-calorie snack a day with something healthier. For example, you could have a smoothie or a piece of fruit instead of a morning pastry. Or you could choose a drink that's lower in fat, sugar or alcohol and therefore contains fewer calories. For example, you could swap a sugary, fizzy drink for sparkling water with a slice of lemon. You can learn more about small, healthy changes to your diet by reading Healthy food swaps On the whole, eating less while maintaining a balanced diet and being more active will keep weight off.

You can also find lots of information on eating a healthy, balanced diet in Food & Diet

Exercise

 

Adults are advised to do 150 minutes of physical activity every week. Read more about activity guidelines for adults and older adults. 

When it comes to physical activity, find ways to fit more movement into your day. It’s recommended that adults between 19 and 64 get at least 150 minutes of moderate-intensity aerobic physical activity – such as fast walking or cycling – every week. If you are new to activity then you should try to build up to this amount gradually. For more information, see Physical Activity Guidelines For Adults

Being physically active is an important part of a healthy lifestyle. People who do regular activity have a lower risk of many chronic diseases, such as heart disease, type 2 diabetes, some cancers and stroke.

For many, brisk walking is a great way to fit activity into daily life. Learn more in  the 10,000 steps challenge.

There's more information and advice on getting active in Fitness.

Stick to the changes 

 

Once you’ve identified the lifestyle changes you want to make, give yourself time to make them part of your life.

At some point, the weight loss that results from these changes will stop and your weight will stabilise. But it’s important to remember that if you want to maintain your new, healthier weight, you need to stick to the changes.

“This is where many people slip up,” says Dr Brewster. “They feel as though the changes they’ve made 'aren’t working any more', and so they go back to old habits. In fact, the changes are working, as they are keeping you at your new weight. If you let go of them, you’ll put weight back on.

“Really get those changes set into your lifestyle. Once you’ve done that and your weight has stayed the same for a while, if you’re still not a healthy weight you can think about another set of small changes.

“That’s the step-by-step method that will give you the best chance of achieving a healthy weight long term.”

Article Souce:
http://www.nhs.uk/Livewell/loseweight/Pages/keep-weight-off.aspx#physical

Last reviewed: 22/02/2013
Next review due: 22/02/2015