Low glycemic index diets are better then high protein diets
Australian research team lead by Dr. Jennie Brand-Miller at the University of Sydney conducted a trial in which 129 overweight subjects ages 18 to 40 were randomly assigned to one of four weight-loss diets for 12-week. All four diets were comprised of reduced fat (30 percent of total energy intake) and held daily calories to 1400 kcal for women and 1900 kcal for men.
This was the first clinical trial comparing the effects of glycemic index and high-protein diets on weight loss and cardiovascular risk.
The diets varied in target levels of carbohydrates, proteins, and glycemic load (i.e., glycemic index multiplied by the amount of carbohydrate, divided by 100) as follows:
Diet 1: carbohydrates comprise 55 percent of total energy intake, protein 15 percent of total energy intake, high glycemic load (127 g)
Diet 2: similar to diet 1 except a lower glycemic load (75g)
Diet 3: protein comprises 25 percent total energy intake (based on lean red meat), carbohydrate reduced to 45 percenttotal energy of intake, and high glycemic load (87 g)
Diet 4: Similar to diet 3, except...
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