The Claim
Co-ingestion of protein and leucine with carbohydrates shifts whole-body protein balance from negative to positive in both young and elderly men, indicating a net gain in protein retention after simulated daily activities.
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.
When young and elderly men consume protein and leucine together with carbohydrates after simulated daily activities, their bodies retain more protein than they break down.
See the scientific wording
Co-ingestion of protein and leucine with carbohydrates shifts whole-body protein balance from negative to positive in both young and elderly men, indicating a net gain in protein retention after simulated daily activities.
When protein and leucine are eaten with carbohydrates, leucine levels in the blood rise, which turns on a cellular switch called mTORC1 in muscle cells. This switch tells the cells to make more muscle proteins, and the extra protein made in the muscles pulls protein from the rest of the body into muscle tissue, so the body keeps more protein overall instead of losing it.
What the research says
1 studyWhen young and older men ate protein and leucine along with carbs after light activity, their bodies started building more muscle protein than breaking it down—unlike when they ate carbs alone. This means their bodies retained more protein overall.
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.