Efficacy of a novel formulation of L Carnitine, creatine, and leucine on lean body mass and functional muscle strength in healthy older adults: a randomized, double blind placebo controlled study Nutrition & Metabolism Leucine is an essential amino acid that many people know for its role in muscle repair, but new research shows it has an even deeper influence inside the body. Scientists recently discovered Amino Acids: Creatine, L Cysteine, L Arginine, L Glutamic Acid, L Carnitine, L Glycine, L Isoleucine, L Leucine, L Valine, L Lysine, L Taurine, L Threonine, BCAA Analitik Kimya posted on the topic LinkedIn L Leucine helps boost protein synthesis with Bulk Nutrients L Leucine