L-Leucine

L-Leucine is one of three branched-chain amino acids (or BCAAs). These three essential amino acids make up approximately 1/3 of skeletal muscle in the human body, and play an important role in protein synthesis.

Leucine is the most important of these amino acids, but you need to have a specific ratio of BCAAs for them to be used properly by the body. Thus, most branch chain amino acids are packaged in a 2:1:1 ratio (Leucine:Isoleucine:Valine).

A 4:1:1 ratio is not unheard of either, which is why you might want to purchase some extra L-Leucine separately from the products in this cateogyr.