Effect of Dietary Protein Content on Weight Gain, Energy Expenditure, and Body Composition During Overeating
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Discussion
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Implication
Randomized trial evaluates dietary protein effects on weight gain and energy expenditure during overeating, suggesting protein type influences outcomes.
Key Points
- To evaluate how different protein levels in diets affect weight gain, energy expenditure, and body composition during overeating.
- Single-blind, randomized controlled trial with 25 healthy volunteers aged 18 to 35
- Participants consumed weight-stabilizing diets before being randomized to low, normal, or high protein diets for 8 weeks
- Body composition and energy expenditure were measured biweekly and weekly, respectively.
- Low protein group gained 3.16 kg compared to 6.05 kg in the normal group and 6.51 kg in the high group (P=.002)
- Body fat increased similarly across all groups, accounting for 50% to over 90% of excess calories
- Resting energy expenditure increased in normal (160 kcal/d) and high protein (227 kcal/d) diets, but not in the low protein diet.
Cite This Study
Bray et al. (2012) studied this question.