Saturday, September 17, 2011

Weight Loss and Efficacy and Safety of Low-Fat Diets

In a randomized intervention studies comparing low fat diets to normal fat diets show that low fat diets prevent weight gain in normal weight subjects and produce weight loss in overweight individuals, including 16 trials and involving 1728 individuals, conducted by Research Department of Human Nutrition & Centre for Advanced Food Research, The Royal Veterinary and Agricultural University, Rolighedsvej (1), found that the difference in weight loss between intervention and control groups was 2.5 kg (95% CI, 1.5-3.5; P<0.0001). Weight loss was positively related to pre-treatment body weight (r=0.52, P<0.05) and to reduction in percentage energy as fat (0.37 kg/%, P<0.005). Extrapolated to a body mass index (BMI) approximately 30 kg/m(2), and assuming a 10% reduction in dietary fat, the predicted weight loss would be 4.4 kg (95% CI, 2.0-6.8 kg), which has been confirmed in subsequent studies. Newer studies have shown that replacing some carbohydrate with protein may enhance weight loss.... Low fat diets with a high content of complex carbohydrates and protein do not produce any adverse effect on cardiovascular risk factors when weight loss is allowed to occur, and they have been shown to decrease mortality among high risk subjects.

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(1) "The role of dietary fat in the prevention and treatment of obesity. Efficacy and safety of low-fat diets." by Astrup A., posted in PubMed

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