
The Fast Metabolism Diet is a 28-day nutrition program created by American nutritionist Haylie Pomroy. It is designed to boost the rate of metabolism to burn body fat and promote weight loss. The diet is split into three phases, each emphasizing different foods and recommending various physical activities. While some people have praised the diet for its effectiveness and simplicity, others have criticized it for being unsustainable and complicated. The diet eliminates many common foods and requires a lot of measuring, weighing, and food preparation. There is also no research to support the theory of surprising your metabolism as a way to lose weight.
| Characteristics | Values |
|---|---|
| Creator | Haylie Pomroy |
| Creator's Credentials | Nutritionist, author, integrative health care clinic owner |
| Duration | 28 days |
| Phases | 3 |
| Weight Loss | Up to 20 pounds |
| Exercise Types | Aerobic, strength training, yoga |
| Exercise Frequency | 2-3 times per day |
| Food Types | High-glycemic fruit, moderate protein, low-fat, high-protein, high-vegetable, low-carbohydrate, healthy fats, moderate carbohydrates |
| Food to Avoid | Sweets, fruit juices, dehydrated fruit, soda, corn, soy, sugar, artificial sweeteners, alcohol, caffeine, gluten, lactose |
| Food Flexibility | Requires measuring, weighing, and food prepping |
| Criticism | Lack of supporting research, unsustainable, complicated |
| Supporters | David Swift, Dr. Jacqueline Fields M.D. |
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What You'll Learn

The diet's inventor, Haylie Pomroy, is a celebrity weight loss guru
The Fast Metabolism Diet is a nutrition program designed to help people lose weight by speeding up their metabolism. The diet's inventor, Haylie Pomroy, is a celebrity weight loss guru with over 20 years of experience in helping people lose weight and improve their health. Pomroy is a nutritionist and author of the #1 New York Times bestseller, "The Fast Metabolism Diet." She has worked with numerous celebrities and athletes, including Jennifer Lopez, LL Cool J, Reese Witherspoon, Cher, Raquel Welch, and Robert Downey Jr.
Pomroy's approach to weight loss focuses on boosting metabolism through specific dietary and lifestyle changes. The Fast Metabolism Diet is a 28-day plan divided into three phases, each with distinct food recommendations and physical activities. The diet emphasizes eating real, nutritious food and does not require counting calories, fats, or carbohydrates. According to Pomroy, this approach stimulates metabolism, increases fat burning, and promotes weight loss.
One of the key principles of the Fast Metabolism Diet is the rotation of different forms of exercise, including aerobic exercise, strength training, and yoga. This approach is supported by research, as it keeps overall activity levels high while allowing for muscle recovery on off days. Additionally, the diet involves rotating between different foods throughout the week, which Pomroy claims helps speed up metabolism and burn more calories.
While the diet has received some positive testimonials, it has also been criticized for being unsustainable and restrictive. Some people find it challenging to follow due to the need for frequent measuring, weighing, and food preparation. The diet may not be compatible with those who frequently eat out or attend social events. Furthermore, there is a lack of scientific evidence supporting the theory of "surprising" the metabolism as an effective weight loss strategy.
Despite the criticisms, Pomroy's celebrity clientele and positive testimonials suggest that her methods have achieved success for some individuals. However, it is important to consult with a healthcare provider or registered dietitian before starting any new diet plan, especially if individuals have underlying health conditions.
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The diet is split into three phases, repeated weekly for four weeks
The Fast Metabolism Diet is a 28-day plan, split into three phases, which are repeated weekly for four weeks. The diet was created by American nutritionist Haylie Pomroy and is designed to help people lose weight and speed up their metabolism. The three phases are designed to help the body recover from the previous phase and prepare for the next one.
Phase 1, which lasts for the first two days, focuses on unwinding stress and calming the adrenal glands. During this phase, dieters should eat a high-glycemic, carb-rich diet with moderate amounts of protein and no fats. The goal is to reduce stress and anxiety, prepare the body for weight loss, and encourage the adrenal glands to produce lower amounts of the stress hormone cortisol. Recommended foods include high-glycemic fruits, such as pears, mangoes, pineapples, and cantaloupe, as well as high-carb whole grains like oatmeal, brown rice, and brown-rice pasta.
Phase 2, which covers the next two days, is about unlocking stored fat and building muscle. This phase involves eating a very high-protein, high-vegetable, low-carbohydrate, and low-fat diet, along with strength training.
The final phase, Phase 3, lasts for three days and is focused on boosting metabolism and increasing fat burning in the body. During this phase, dieters increase their intake of healthy fats like olive oil, coconut oil, and avocados, while consuming moderate amounts of carbohydrates and protein. The diet is a little more flexible in this phase, and dieters are encouraged to engage in stress-reducing activities like yoga or meditation.
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The diet recommends rotating between different forms of exercise
The Fast Metabolism Diet is a nutrition program designed to help people lose weight and improve their overall health. The diet, created by American nutritionist Haylie Pomroy, involves a 28-day plan that is divided into three phases, each with specific dietary and physical activity recommendations.
One of the key principles of the Fast Metabolism Diet is the rotation of different forms of exercise. The diet recommends aerobic exercise, strength training, and yoga. This variety of physical activities is supported by research, as it keeps the overall activity level high while allowing specific muscle groups to recover on off days. For example, during Phase 1, which focuses on unwinding stress, vigorous cardio exercises are recommended, while Phase 2, aimed at unlocking fat stores, suggests strength training.
The diet's inventor, Haylie Pomroy, emphasizes that this diet is not about restricting food intake or counting calories, but rather using the fat-burning power of food to boost metabolism and promote weight loss. The rotation of exercises complements this approach by keeping the body active and engaged, which further enhances the metabolism-boosting effects.
It is important to note that while the diet promotes healthy eating and exercise, there is limited scientific evidence specifically supporting its efficacy. Additionally, some critics argue that the diet may be unsustainable due to the complexity of remembering which foods to eat and avoid on specific days. However, Pomroy has developed an app to assist with meal planning and navigating the different phases of the diet.
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The diet eliminates many common foods
The Fast Metabolism Diet is a 28-day nutrition program that promises to help you lose up to 20 pounds (9 kg) in a month. The diet is split into three phases, each emphasizing different foods and providing recommendations for various physical activities. The diet's inventor, Haylie Pomroy, claims that you can eat three full meals a day plus two snacks and still lose weight. This is achieved by rotating foods throughout the week, which, according to Pomroy, will speed up your metabolism so you burn more calories.
The diet does not require you to count fat, carbs, or calories. However, it does require you to stick with the allowed foods on the plan and to strictly avoid other foods, which may pose a challenge since some of the foods that are not allowed are common in the standard American diet, such as wheat and dairy products.
The Fast Metabolism Diet allows plenty of healthy fruits, vegetables, lean meats, and whole grains. For example, Phase 1 of the diet includes high-glycemic, moderate-protein, low-fat foods. It includes carbohydrate-rich foods such as brown rice and quinoa, fruits that are high in natural sugars, and low-fat, moderate-protein foods. Phase 2 is the high-protein, high-vegetable, low-carbohydrate, and low-fat phase. It features high-nutrient cruciferous vegetables and lots of lean protein.
While the diet focuses on eating fairly healthy foods, it is criticized for eliminating some healthy food groups, which is not considered part of a balanced diet. For example, the diet recommends avoiding fats during Phase 1, which is problematic because some healthy foods, such as nuts, avocados, and fatty fish, are high in fat.
Overall, the Fast Metabolism Diet is a restrictive diet that may be challenging to follow due to the elimination of some common foods.
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The diet is criticised for being unsustainable
The Fast Metabolism Diet is a nutrition program that promises to help people lose weight by speeding up their metabolism. The diet is split into three phases, each with different recommended foods and physical activities. It is based on the idea that eating certain foods at the right times can speed up your metabolism, allowing you to eat more and still lose weight.
However, the diet has been criticised for being unsustainable. Firstly, the diet requires strict adherence to specific foods and avoids others, which may be challenging as some of the restricted foods are common in the standard American diet, such as wheat and dairy products. The diet may also be difficult to follow for those who frequently eat out or attend social events, as it requires careful meal planning and preparation.
Additionally, critics argue that the diet's premise, that it is possible to speed up metabolism by eating only certain foods in a particular order, is not supported by scientific evidence. While some foods can cause slight increases in metabolism, any increase is likely to be minor and may not lead to significant weight loss. Furthermore, the diet may not help individuals develop healthy eating habits that can be sustained in the long term.
The Fast Metabolism Diet also requires individuals to stick to specific portion sizes, which may be challenging for those who are used to larger meal sizes. The diet's effectiveness may also vary depending on individual factors such as genetics, age, and physical activity levels, which are not taken into account in a standardised diet plan.
Overall, while the Fast Metabolism Diet may lead to short-term weight loss, it may be challenging to follow due to its restrictive nature and lack of scientific backing. It is important for individuals to consult with healthcare professionals before starting any new diet plan to ensure it aligns with their nutritional needs and health goals.
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Frequently asked questions
The Fast Metabolism Diet is for people who want to lose weight, overcome health challenges and reach their ideal health while still enjoying real food and not going hungry.
The Fast Metabolism Diet was created by American nutritionist Haylie Pomroy, who has spent more than 20 years helping people lose weight.
The Fast Metabolism Diet is a 28-day plan that involves eating specific foods and engaging in different forms of exercise. The diet is split into three phases, each emphasizing different foods and providing recommendations for various physical activities.











































