The Claim

A higher protein intake of approximately 1.3 grams per kilogram of body weight combined with dairy consumption during a calorie deficit maintains strength levels in humans.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
70score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
3 studies reviewed
In plain English

People who consume about 1.3 grams of protein per kilogram of body weight and include dairy while eating fewer calories maintain their strength levels.

See the scientific wording

A higher protein intake (~1.3 g/kg) combined with dairy consumption during a calorie deficit helps maintain strength levels.

Why this might work

When more protein is eaten, especially from dairy, the body uses the amino acids to build and keep muscle proteins strong. Even when calories are low, this keeps the muscle fibers able to generate force, so strength doesn't drop.

Verified mechanismbased on 3 studies

What the research says

3 studies

  1. Study: Impact of Protein Intake during Weight Loss on Preservation of Fat-Free Mass, Resting Energy Expenditure, and Physical Function in Overweight Postmenopausal Women: A Randomized Controlled Trial

    People who ate more protein while losing weight kept their arm strength, while those who ate less protein lost strength. So eating more protein helps you stay strong even when dieting.

  2. Study: Muscle strength gains during resistance exercise training are attenuated with soy compared with dairy or usual protein intake in older adults: A randomized controlled trial.

    People who ate more protein from dairy while working out got much stronger than those who ate soy protein, even though everyone ate the same amount of protein overall. This suggests dairy helps you stay strong when you're eating more protein.

  3. Study: Relationship between different protein intake recommendations with muscle mass and muscle strength

    People who ate more protein (about 1.2 grams per kilogram of body weight) got stronger, even though their muscles didn’t get bigger. This suggests eating more protein helps keep your strength up, which matches the claim.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 3 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.