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Protein Diet

See exciting new possibility related to an important amino acid found in protein called leucine!

Because fat and carbohydrate [Atkin's, etc.] diets have been so popular, the protein diet may be a coming fad. This first study explored whether such a diet might be effective, and found it was. Since then, further studies are showing that this is an extremely effective diet, better than Atkin's!

Protein Intake Is Inversely Associated with Abdominal Obesity in a Multi-Ethnic Population Anwar T. Merchant, et al J. Nutr. 2005 135: 1196-1201.   [Abstract]

"among 617 Canadians ofAboriginal, South Asian, Chinese, and European origins,… waist-hip ratio (WHR)…. Energy-adjusted protein substituted for an equivalentamount of carbohydrate was associated with a reduction in WHR… Fat or total energy were not related to WHRin the same linear regression model. Smoking was positivelyand physical activity inversely related to WHR in the multivariatemodel independent of BMI and other potential confounders. Substitutinga modest amount of protein for carbohydrate may reduce abdominalobesity in a diverse multi-ethnic population. Smoking was positively related to abdominal obesity after accounting for BMI."

Jonathan Q Purnell et al, A high-protein diet induces sustained reductions in appetite, ad libitum caloric intake, and body weight despite compensatory changes in diurnal plasma leptin and ghrelin concentrations , Am J Clin Nutr 2005 82: 41-48

Background: Ad libitum, low-carbohydrate diets decrease caloric intake and cause weight loss. It is unclear whether these effects are due to the reduced carbohydrate content of such diets or to their associated increase in protein intake...Conclusions: An increase in dietary protein from 15% to 30% of energy at a constant carbohydrate intake produces a sustained decrease in ad libitum caloric intake that may be mediated by increased central nervous system leptin sensitivity and results in significant weight loss. This anorexic effect of protein may contribute to the weight loss produced by low-carbohydrate diets.

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