Hay diet

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The Hay Diet is a nutrition method developed by the New York physician William Howard Hay in the 1920s. It claims to work by separating food into three groups: alkaline, acidic, and neutral. (Hay's use of these terms does not completely conform to the scientific use, i.e., the pH of the foods.) Acid foods are not combined with the alkaline ones. Acidic foods are protein rich, such as meat, fish, dairy, etc. Alkaline foods are carbohydrate rich, such as rice, grains and potatoes. It is also known as the food combining diet.

A similar theory, called nutripathy, was developed by Gary A. Martin in the 1970s.[1] Others who have promulgated alkaline-acid diets include Edgar Cayce, D. C. Jarvis, and Robert O. Young.

History

File:Foodcombinationchart.gif
Chart from How to Always Be Well, William Howard Hay

William Hay contracted Bright's disease (or what modern medicine refers to as Nephritis). Heart-dilated and near death, Hay began eating only naturalTemplate:Clarify foods; his calorie intake dropped and his health improved. Hay spent the following decade studying naturopathy and food combining to reduce the acid end-product of digestion. He found that fruits and vegetables produce an alkaline end-product when they are fully metabolized, while processed and refined foods left a high acidic environment after digestion. His theories went on to encompass food-combining; whereas incorrect combination would cause even alkaline foods to leave a less desirable acidic digestion end-product.[2] Template:Quote

The Hay System promoted the practice of eating three meals per day with meal one being alkaline foods only, meal two protein foods with salads, vegetables and fruit, and meal three comprising starchy foods with salads, vegetables and sweet fruit. There should be an interval of 4.0 to 4.5 hours between each meal. However, in 1935, Stewart Baxter showed that the pancreas secretes digestion enzymes simultaneously regardless of whether the food eaten is carbohydrates or protein.[3] The theory that carbohydrate and protein rich foods should be eaten separately is considered "unfounded" because it ignores the fact that carbohydrate rich foods all contain significant amounts of protein. Eating protein separately from carbohydrates also tends to cause the body to burn the protein as an energy source rather than to build muscle.[4]

American artist Man Ray was a notable follower of the Hay Diet.[5]

Studies

The food-combining diet has been the subject of one peer-reviewed randomized clinical trial, which found no benefit from the diet in terms of weight loss.[6]

See also

References

Metabolic.jpg

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Further reading

  • Boyer, Josephine, and Katherine Cowdin (1934). Hay Dieting: Menus and Receipts for All Occasions. With a foreword by William Howard Hay. New York, New York: C. Scribner's sons.
  • Hay, William Howard (1933). Health Via Food. Ed. and rev. by Rasmus Alsaker, with a special introduction by Oliver Cabana, Jr. First printing, June, 1929; Tenth printing, February, 1933. East Aurora, New York, Sun-Diet Health Foundation.
  • Hay, William Howard (1935). Weight Control. New York: Hay System.
  • Rasso, Jack, Mystical Medical Alternativism, Committee for Skeptical Inquiry, Skeptical Inquirer, September/October 1995. available online
  • Needes, Robin, Naturopathy for Self-healing: Nutrition, Life-style, Herbs, Homoeopathy, "Acid Alkaline Balance". available online
  • Cardwell, Glenn, The Skeptic, Nutrition: Food Combining, Vol 16, No 2. available online
  • Baldwin, Neil, Man Ray: American Artist, p. 170. available online
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