Weight-Loss
Diets
All weight-loss diets are based on the principle of decreased
caloric intake and varying amount of proteins, fats, and carbohydrates (the macronutrients). The differences
between the diets are principally regarding the ratios of macronutrients and, to a lesser degree, the sources
of the macronutrients-such as vegetable or animal protein or saturated or polyunsaturated
fats:
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Balanced diets: In these diets,
the emphasis is not on severely limiting one particular macronutrient, but on eating a balanced diet
with decreased caloric intake. Weight Watchers, Jenny Craig, and eDiets are also balanced diets with an
emphasis on calorie counting. Jenny Craig and eDiets use prepared meals to control the caloric intake per meal.
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High-protein diets: These diets
emphasize high protein intake and severely restricting carbohydrates (5 to 10 percent). Examples of
high-protein diets are
-
-
The Atkins Diet (no
restrictions on protein and fat sources)
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The South Beach Diet
(emphasizes low-glycemic carbohydrates and preferences for monounsaturated and polyunsaturated
fats)
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There are some diets where
high protein is recommended, but not to the same extent as in the Atkins or South Beach diets,
and there is more carbohydrate intake. Examples of these diets
are
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The Zone Diet (in which
every meal needs to be 30 percent protein, 30 percent fat, and 40 percent
carbohydrates)
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The CSIRO (Commonwealth
Scientific and Industrial Research Organization) Total Wellbeing Diet (Australian)
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Fat-restricted diets: These diets
stress eating less energy-dense foods, such as carbohydrates and proteins (a gram of fat contains 9
kcal, compared to 4 kcal in a gram of protein or carbohydrate). Very low fat diets, in which fats are
less than 10 percent of energy intake, include \
-
-
The Pritikin Diet
(nonvegetarian)
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The Ornish Diet
(vegetarian-you can eat eggs and dairy products)
-
The McDougall Diet
(vegetarian)
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