Research
Adherence
High protein intake is the most satiating macronutrient per calorie and promotes weight loss and fat loss when combined with calorie restriction, primarily by preserving lean mass and increasing energy expenditure.
Eating more protein helps you feel full and lose weight, especially if you are also eating fewer calories or exercising. It helps keep your muscles while you lose fat. However, just eating protein without exercise won't necessarily make you a better athlete or significantly stronger.
GoodSupportsHIGH confidence
Dietary protein is the most satiating macronutrient per calorie... high-protein diets generally reduce food intake... resulting weight loss is also associated with increased energy expenditure and improvements in various metabolic and/or cardiovascular end points.
Why this rating
Consistent evidence in humans and rodents for satiety and weight loss.
Source
Protein-Restricted Diets and Their Impact on Metabolic Health and Aging
Sora Q. Kim et al. · Annual Review of Nutrition · 2025
DOI 10.1146/annurev-nutr-121624-114918
narrative_reviewCited 9×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Protein restriction (specifically low-protein, high-carbohydrate diets) extends lifespan and improves metabolic health in model organisms, likely through mechanisms distinct from or overlapping with calorie restriction, such as elevated FGF21.Good
- Current dietary guidelines (RDA of 0.8 g/kg) may be insufficient for older adults to prevent muscle loss, but exceeding this amount alone does not significantly improve strength or performance without resistance training.Moderate
Related findings · Adherence
- Regular physical activity (at least 150 minutes/week of moderate-intensity) reduces all-cause and cardiovascular mortality by 20-30% and lowers the risk of type 2 diabetes by 25-35%.Strong
- Increasing physical activity from a sedentary lifestyle to an active one in middle adulthood significantly reduces the risk of coronary events compared to remaining sedentary.Strong
- Resistance exercise is the only intervention capable of consistently restoring muscle function and strength in sarcopenia, partially overcoming age-related anabolic resistance.Strong
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