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Fit for Life

A permanent weight loss plan that guarantees health.

BACKGROUND Start the Diet Now Advertisement

Fit for Life is #1 New York Times Bestselling book by Harvey and Marilyn Diamond.

This international sensation explains how to change both your figure and your life. Nutritional specialist Harvey and Marilyn Diamond explain how you can eat more kinds of food than you ever ate before without counting calories and still lose weight!

The natural body cycles, permanent weight-loss plan that proves it's not only what you eat, but also when and how, Fit for Life is the perfect solution for those who want to look and feel their best. Join the millions of Americans who are Fit for Life and begin your transformation with:

  • The vital principles that bring you permanent weight loss and high energy
  • The FIT FOR LIFE secrets of timing and food combining that work with your natural body cycles
  • A four-week meal plan, menus, shopping tips, and exercise
  • Delicious recipes and more

Fit for Life offers an integrative medicine approach that combines the principles of food combining with energy-based science. Integrative medicine merges centuries of preventive medical concepts from hundred of different cultures with the modern need to reduce stress, resolve conflict and avoid detrimental lifestyles and change behavioral patterns that lead to obesity, lethargy and a host of diseases and health conditions.

  • Integrative approach to health offers numerous and far-reaching physical, mental, emotional and spiritual health effects
  • Promotes a whole-foods diet
  • Offers a lifelong way of eating that promotes satiety and weight loss
  • Focuses on eating foods in their natural state
  • Promotion of raw milk is controversial
  • Food combining principles have not been scientifically proven
  • High fiber in diet may cause digestive challenges for those not used to eating lots of plant-based foods

The "Fit for Life" diet is truly a whole and natural foods nutrition plan. Its approach encourages you to stop "living to eat" and instead, to start "eating to live."

The authors explain that body functions have a daily cycle: noon to 8 p.m.-- appropriation (eating and digestion); 8 p.m. to 4 a.m.--assimilation (absorption and use); 4 a.m. to noon--elimination (of body wastes and food debris).

Fit for Life aims to return you to a lifestyle based on your natural body cycles. That means 70 percent of your diet should be "high-water-content foods"--fruits and vegetables--which facilitate all body functions. Consume nothing but fruit or fruit juice until noon, then eat salad and vegetables with every meal for the rest of the day.

The plan advocates for a largely plant-based diet filled with fresh and raw vegetables, tons of fruit , legumes, nuts and limited amounts of animal proteins and select grains.

The idea behind the plan is to keep you feeling satisfied while offering your body the ideal digestive and absorption environment to lose weight, improve energy and function at its absolute best.

Here is a sample day on the Fit for Life plan:

  • Upon waking up: A glass of fresh fruit juice that you ideally make yourself.
  • Breakfast: Fresh fruit salad (not canned)
  • Mid-morning: More fresh fruit. Peaches, plums, oranges and melon are recommended. If you are really hungry, a banana can be eaten.
  • Lunch: Large salad with tons of raw greens and water-soluble vegetables or a tomato and avocado sandwich. You can add whole-grain toast with real butter or some soup if you are extra hungry.
  • Dinner: Buttered yams, a big green salad or lightly steamed vegetables. Mediterranean Rice Salad or a Steak-lovers Salad may also be consumed as a special main course.

Fit for Life also includes extensive resources on products to buy, shopping lists, meal guidelines, and a four-week sample menu plan.

In addition, it outlines specific lifestyle nutrition guidelines. Some of them are as follows:

  • Use fresh fruits and vegetables whenever possible.
  • Never use produce that is canned in syrups or sodium-packed sauces.
  • Fruit can be consumed if you are hungry three hours after your main meals.
  • Only use salad dressings made without preservatives.
  • Never use vinegar in salad dressings.
  • Use only whole-grain bread.
  • Use raw butter and raw dairy products whenever possible.
  • Avoid the excess consumption of raw onions and raw garlic.
  • Carbohydrates and proteins should never be combined in one meal.

- Water should never be consumed at meals.



Exercise is strongly encouraged as part of the Fit for Life plan to not just lose weight but to remain healthy.

It is recommended you do some sort of aerobic exercise everyday to exercise your heart. As a very daily minimum, you should perform a 20-minute brisk walk every day.

Rebounding or jumping on a trampoline is the preferred method of daily exercise as it stimulates the heart as well as boosts mood and provides a complete overall body workout.

In addition, walking, biking or hiking are also encouraged. But rather than counting down minutes on the treadmill, you are encouraged to go outdoors for exercise to breathe in fresh air and let the sun rejuvenate your body and spirit. Because of the sun's rejuvenating power, you are instructed to not wear sunscreen while you exercise outside.


The Fit for Life program offers an amazing program that is tuned in to your body's natural cycles and rhythms.

Its focus on plant-based foods in their natural state as well as its promotion of plant-based protein sources will not only enhance weight loss, but this is precisely the kind of diet that scientific studies are showing us through data that is the healthiest for our bodies.

Fit for Life is truly a way of life that incorporates a number of principles and a basic philosophy that we function at our absolute best when our lifestyle patterns are aligned with the natural ways and rhythms of life.

Common Misspellings

fit 4 life, fit for health, fit for live

Related Diets: Volumetrics, Diet for a New America, Food Combining, Beverly Hills Diet, The Kind Diet, Whole Foods Diet Cookbook

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(Page 1 of 1, 4 total comments)


I did it years ago and lost 7 lbs in one week. It definitely works to lose weight but is a lifestyle in order to maintain the weight loss. I am doing it again now because of meds that made me blow up.

posted Jul 5th, 2013 10:31 pm


Fit for Life provides one of the basic pillars of my platform for a healthy life. A must read health basic.

posted Nov 15th, 2012 5:21 pm



posted Feb 16th, 2012 11:19 am


This book changed my life. Not only did I lose weight quickly and easily, I had more energy, slept better, and could think more clearly. I can eat what I want as long as I follow the guidelines. Amazing!

posted Aug 7th, 2011 9:57 pm


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