For active adults preserving muscle, ~1.6g/kg is well supported. The 1g/lb bro-target outruns the data slightly.
Meta-analyses converge on 1.6 g/kg as the plateau for muscle protein synthesis in trained adults.
Our read is Partially Supported. The core mechanism holds and the direction is right, but the popular framing tends to overrun what the trials actually show. With a developing evidence base (74/100) and a working majority (72% consensus), eating 1g of protein per pound of bodyweight is reasonable for the right person at $80/month — just calibrate the expectation to the data, not the marketing.
Pulled the public claims about eating 1g of protein per pound of bodyweight from proponents on file (a tracked voice and a tracked voice) and weighed them against the more cautious voices in the field, then cross-checked each against the primary trial and cohort literature and the prevailing clinical guidance. We grade the claim against what the human evidence actually supports, not against how confidently it is stated.
Downside risk on eating 1g of protein per pound of bodyweight is low at sensible doses, but low risk is not no risk: individual response varies, and a low-risk intervention is still only worth it if the benefit is real.
A large, long-duration RCT in a general population that either confirms a hard-outcome benefit or shows the effect washes out once it is properly controlled.
Benefits hold across the populations where it's been tested.
The effect size is large enough to matter clinically, not just statistically.
Mechanistic and trial evidence converge on a real, replicable effect.
Benefits hold across the populations where it's been tested.
Mechanistic and trial evidence converge on a real, replicable effect.
Confounding and publication bias inflate the apparent benefit.
Confounding and publication bias inflate the apparent benefit.
Confounding and publication bias inflate the apparent benefit.
Animal-model results don't translate to the human protocol being recommended.
Animal-model results don't translate to the human protocol being recommended.