Very Low Calorie Diets These diets are usually based on fluid preparations which are the dieter
Very Low Calorie Diets These diets are usually based on fluid preparations which are the dieter's sole source of calories and nutrients, although some have added solid foods such as muesli bars. These diets can cause the body's metabolism to drop below normal. This means that when the dieter resumes normal eating, the weight not only returns but is also more difficult than ever to lose. These diets do not encourage healthy eating habits which lead to a more gradual but permanent weight loss. Very low calorie diets should only be used by the seriously overweight, and they should not be used by anyone for more than three weeks.
The Hay Diet This diet was devised by an American doctor, William Howard Hay, to fight digestive problems such as ulcers. Many people have claimed dramatic improvements in their heath after adopting the Hays diet, but medical proof of its effectiveness is limited.
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