The Claim
In healthy older men, ingestion of a single 25 g whey protein meal increases muscle protein synthesis rates from approximately 0.035% per hour in the fasted state to 0.060% per hour in the postprandial state, regardless of prior 14-day habituation to low (0.7 g/kg/day) or high (1.5 g/kg/day) protein intake.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In healthy older men, consuming 25 grams of whey protein raises the rate of muscle protein synthesis from 0.035% per hour to 0.060% per hour after eating, regardless of whether they had been eating low or high amounts of protein over the previous 14 days.
See the scientific wording
In healthy older men, a single 25 g whey protein meal increases muscle protein synthesis rates from approximately 0.035% per hour in the fasted state to 0.060% per hour in the postprandial state, regardless of prior 14-day habituation to low (0.7 g/kg/day) or high (1.5 g/kg/day) protein intake.
When whey protein is consumed, amino acids from the protein enter the bloodstream and reach muscle cells, where they trigger a molecular switch that turns on the machinery for building new muscle proteins, increasing the rate at which muscles make new protein.
What the research says
1 studyEven if older men ate a lot or a little protein for two weeks, their muscles built new protein at almost the same speed after drinking the same whey shake — so past diet didn’t change the effect.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.