Muscle Growth Trigger
Leucine is the most anabolic of all amino acids - meaning it’s the primary trigger for muscle protein synthesis. It activates the mTOR pathway, which signals the body to build and repair muscle tissue, particularly after strength training or resistance work.
It’s especially important in fasted states or calorie-controlled phases, where preserving lean mass is a priority. Supplementing with leucine helps ensure your muscles have what they need to rebuild stronger, even when training hard or eating lean.
In short: Triggers muscle repair and supports lean muscle retention.
📚 Citation: Norton, L. E., & Layman, D. K. "Leucine regulates translation initiation of protein synthesis in skeletal muscle after exercise." Journal of Nutrition (2006).