The Claim
In older men aged approximately 67 years, 20 days of habituation to a high protein intake (greater than 2.1 g/kg lean body mass per day) does not increase the postprandial fractional synthesis rate of myofibrillar proteins compared to a recommended protein intake (1.1 g/kg lean body mass per day), indicating that prolonged high protein consumption does not enhance the muscle's ability to incorporate dietary amino acids into structural proteins under standardized meal conditions.
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 men around 67 years old, consuming more protein than recommended for 20 days does not increase the rate at which muscle proteins are built from dietary amino acids after a meal, compared to consuming the recommended amount.
See the scientific wording
In older men aged approximately 67 years, 20 days of habituation to a high protein intake (greater than 2.1 g/kg lean body mass per day) does not increase the postprandial fractional synthesis rate of myofibrillar proteins compared to a recommended protein intake (1.1 g/kg lean body mass per day), indicating that prolonged high protein consumption does not enhance the muscle's ability to incorporate dietary amino acids into structural proteins under standardized meal conditions.
When older men eat much more protein than needed, their muscle cells reach a point where they cannot use any more amino acids to build muscle proteins, even though more amino acids are available. The system that turns amino acids into muscle proteins hits its maximum speed and stays there, so eating extra protein does not make more muscle protein.
What the research says
1 studyFor older men, eating way more protein than recommended for 20 days didn’t help their muscles use the protein from meals to build more muscle — their muscles processed the same amount of protein whether they ate a lot or just the recommended amount.
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.