leucine
2 interactions related to leucine
leucine + carbohydrates
Leucine activates mTOR-driven muscle protein synthesis and stimulates insulin release. Taken with carbohydrate, the insulin response is larger than with carbohydrate alone, which helps suppress muscle protein breakdown and increase amino acid uptake. The combination supports the post-exercise anabolic response, though leucine works best as part of a complete protein source rather than on its own.
bcaa + carbohydrates
Taking branched-chain amino acids with carbohydrate around training produces a modest, additive boost to post-exercise muscle protein synthesis through the insulin response and leucine-driven mTOR signaling. The effect is real but small, and BCAAs lack the other essential amino acids needed to fully build muscle, so a complete protein source with carbohydrate is the better default.