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Carbs in Weight Loss Diets
Effects of Different Weight Loss Plans on Body Composition, Glucose and Lipid Metabolism
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Carbs in Weight Loss Diets Study

Compare the effects of 2 weight-loss diets differing in protein-to-carbohydrate ratio on body composition, glucose and lipid metabolism.

It is not clear whether varying the protein-to-carbohydrate ratio of weight-loss diets benefits body composition or metabolism.

Carbs in Weight Loss Diets Study - Aim
The objective was to compare the effects of 2 weight-loss diets differing in protein-to-carbohydrate ratio on body composition, glucose and lipid metabolism, and markers of bone turnover.

Carbs in Weight Loss Diets Study - Method
A parallel design included either a high-protein diet of meat, poultry, and dairy foods (HP diet: 27 percent of energy as protein, 44 percent as carbohydrate, and 29 percent as fat) or a standard-protein diet low in those foods (SP diet: 16 percent of energy as protein, 57 percent as carbohydrate, and 27 percent as fat) during 12 wk of energy restriction (6-6.3 MJ/d) and 4 wk of energy balance. Fifty-seven overweight volunteers completed the study.

Carbs in Weight Loss Diets Study - Results
Weight loss and total fat loss did not differ between diet groups.

In women, total lean mass was significantly better preserved with the HP diet than with the SP diet. Those fed the HP diet had significantly less glycemic response at weeks 0 and 16 than did those fed the SP diet. After weight loss, the glycemic response decreased significantly more in the HP diet group. The reduction in serum triacylglycerol concentrations was significantly greater in the HP diet group (23 percent) than in the SP diet group (10 percent). Markers of bone turnover, calcium excretion, and systolic blood pressure were unchanged.

Carbs in Weight Loss Diets Study - Conclusion
Replacing carbohydrate with protein from meat, poultry, and dairy foods has beneficial metabolic effects and no adverse effects on markers of bone turnover or calcium excretion.

Source: Farnsworth E, Luscombe ND, Noakes M, Wittert G, Argyiou E, Clifton PM. Department of Physiology, University of Adelaide, SA, Australia. 2002

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Weight Loss News
Theories about how to lose weight, how to reduce obesity and general weight management are constantly changing along with ideas about which weight loss diet program is best and so forth. At present, however, a balanced diet combined with regular exercise remains the favorite weight loss strategy of most dietitians and weight loss experts.

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