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Low GI Weight Loss Diets and Obesity
Do Low Glycemic Index Diets Reduce Obesity
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Low GI Weight Loss Diets & Obesity - Studies

Question: Should obese patients be counselled to follow a low-glycemic index diet?

Answer: No.

In diabetes research the glycemic index(GI) of carbohydrates has long been recognized and a low GI is recommended. The same is now often the case in lipid research. Recently, a new debate has arisen around whether a low-GI diet should also be advocated for appetite- and long-term body weight control. A systematic review was performed of published human intervention studies comparing the effects of high- and low-GI foods or diets on appetite, food intake, energy expenditure and body weight. In a total of 31 short-term studies (< 1 d), low-GI foods were associated with greater satiety or reduced hunger in 15 studies, whereas reduced satiety or no differences were seen in 16 other studies. Low-GI foods reduced ad libitum food intake in seven studies, but not in eight other studies. In 20 longer-term studies (< 6 months), a weight loss on a low-GI diet was seen in four and on a high-GI diet in two, with no difference recorded in 14. The average weight loss was 1.5 kg on a low-GI diet and 1.6 kg on a high-GI diet. To conclude, there is no evidence at present that low-GI foods are superior to high-GI foods in regard to long-term body weight control. However, the ideal long-term study where ad libitum intake and fluctuations in body weight are permitted, and the diets are similar in all aspects except GI, has not yet been performed.

Source: Raben A. Research Department of Human Nutrition, Centre for Advanced Food Studies, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark. 2003

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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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