Fit for Life

Fit for Life is a diet and lifestyle promoted by Harvey Diamond and Marilyn Diamond, which stems from the principles in Natural Hygiene. As the title of the book suggests, Fit for Life claims how to lose excess body weight and maintain good health via long term dietary and lifestyle practices, rather than short term dieting. In the Fit for Life book series many dietary principles are recommended including eating only fruit in the morning, eating predominantly "live...high-water-content" food (as per the raw food diet), and if eating animal protein to avoid combining it with complex carbohydrates (such as bread, rice or pasta). Tony Robbins promotes the Fit for Life principles and veganism to increase energy levels in his book Unlimited Power.

In Fit for Life: A New Beginning (2001), Harvey Diamond claims to have experienced a series of fortuitous coincidences (also known as synchronicity) during his research period and writing of the Fit for Life books, recommending the book The Celestine Prophecy by James Redfield.

Despite its popularity, it has received criticism from dietitians and doctors for espousing pseudoscientific theories, which include describing the human body as being "cleansed" or "clogged" and a variety of other claims that are inconsistent with medical science. Few would deny the value of eating more fresh fruit and vegetables, as it may lower the chance of developing heart disease, cancer and diabetes. Fit for Life, however, goes beyond this to argue that these can only be eaten in combination with certain other foods -- a claim that the authors (now divorced) do not support with any evidence or studies in their book.

In Fit for Life II (1989) the Diamonds warned against eating artificial food additives such as hydrogenated vegetable oil, which at the time was being promoted by the food industry as a healthy alternative to saturated fat. The Diamonds' claims were disregarded by the food industry and criticised by various dietitians. Now nearly twenty years later hydrogenated and partially hydrogenated vegetable oil are regarded by health officials, such as those in New York City, to be so toxic that food containing the additive is classified on a par with food containing rodent droppings. Harvard's School of Public Health researchers have estimated that trans fat, such as hydrogenated vegetable oil, contribute to the death of 30,000 U.S. citizens per year, and many more worldwide.

Book series

 * Fit for Life (1987) - by Harvey and Marilyn Diamond ISBN 0-446-30015-2
 * Fit for Life II (1989) - by Harvey and Marilyn Diamond ISBN 0-446-35875-4
 * Fit for Life: A New Beginning (2001) - by Harvey Diamond ISBN 1-57566-718-5
 * Living Without Pain (Fit for Life)- by Harvey Diamond ISBN 0976996103