The Claim
Ingesting a soy-dairy protein blend after resistance exercise in young adult men results in a higher net positive amino acid balance across the leg by approximately 6.8 nmol·min⁻¹·100 g lean leg mass⁻¹ at 60 and 120 minutes post-ingestion compared to whey protein, despite no difference in muscle protein synthesis rates.
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.
After resistance exercise, young adult men who consume a soy-dairy protein blend maintain a higher net amino acid balance in their leg muscles at 60 and 120 minutes compared to those who consume whey protein, even though both protein blends stimulate muscle protein synthesis to the same extent.
See the scientific wording
Ingesting a soy-dairy protein blend after resistance exercise in young adult men prolongs the net positive amino acid balance across the leg by approximately 6.8 nmol·min⁻¹·100 g lean leg mass⁻¹ at 60 and 120 minutes post-ingestion compared to whey protein, despite identical muscle protein synthesis rates, suggesting a transient metabolic advantage in amino acid retention without enhanced muscle building.
When a mix of slow- and fast-digesting proteins is consumed after exercise, amino acids stay in the blood longer than when only fast-digesting protein is eaten. This extended presence of amino acids in the blood pushes more amino acids into muscle cells by turning on genes that make transport proteins on the muscle cell surface. More transport proteins pull in more amino acids, and the muscle holds onto them longer without releasing them back out, even though the rate of building new muscle protein stays the same.
What the research says
1 studyAfter working out, drinking a mix of soy and dairy proteins keeps more amino acids in your leg muscles for a little longer than drinking just whey protein — but your muscles don’t grow any faster. It’s like holding onto extra building blocks longer, without using them to build more muscle.
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.