Your body makes new muscle from protein. Eating about 1.6 grams of protein per kilogram of your weight each day makes that happen faster than eating half that amount.
See the scientific wording
Consuming 1.6 grams of protein per kilogram of body weight per day is associated with greater muscle protein synthesis compared to consuming 0.8 grams per kilogram per day.
Contradicted by evidence
Randomized trialsOne good-quality study contradicts this claim.
What the research says
1 study reviewedSupporting (0)
No supporting studies found yet
We'll keep looking as more research is published.
Contradicting (1)
Randomized Controlled TrialHuman2015
Eating more protein (even a lot more) didn't make muscles build faster in this study, so eating 1.6 grams compared to 0.8 grams probably won't make a difference either.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
Scores reflect study quality, not just count.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 contradicting study
How Fit Body Science checks a claim
- 1
We isolate the claim
Health advice from videos, articles and studies is broken down into single, testable claims.
- 2
We find the research
Each claim is matched against peer-reviewed studies, with every source cited by DOI.
- 3
We grade the evidence
Studies are scored on methodology, statistical rigor, transparency and publication quality.
The fitness and health internet is full of confident claims. We check them against real research.
Every claim on this site is traced back to peer-reviewed studies, scored on methodology and reporting quality, and given a verdict you can audit yourself — sources, DOIs and all.
- Full evidence breakdown and mechanism chains
- Ask our AI anything about a claim or its studies
- Get notified when new research changes a verdict