Leucine is a key nutrient for the regulation of body composition

Leucine is an amino acid that serves as a building block for proteins. According to a literature review by the Chinese Ministry of Agriculture, leucine is also an important regulator of protein and fat metabolism.

Leucine activates the mTOR pathway, which is crucial for muscle protein synthesis. It also promotes the growth of mitochondria, which, as cellular energy centers, are crucial for the health and longevity of cells. Leucine is particularly important as a nutrient for aging adults, breastfeeding women and people on calorie-restricted diets. Bodybuilders should take leucine supplements to increase muscle mass and reduce fat.

(Frontiers in Bioscience, Landmark, 20: 796 - 813, 2015)