L-Isoleucine is an essential amino acid that cannot be produced by the body and must be obtained through the diet or supplementation. It is one of the three branched-chain amino acids (BCAAs) and plays a crucial role in protein synthesis, muscle maintenance, and energy production.

As a food ingredient, L-Isoleucine is commonly used in sports nutrition products to support muscle growth and recovery, as well as in infant formulas to support healthy growth and development. It can also be found in protein supplements and functional foods.

Studies have shown that L-Isoleucine may help improve exercise performance and reduce muscle damage caused by intense exercise. It has also been linked to improved immune function, insulin sensitivity, and glucose metabolism.

Overall, L-Isoleucine is a versatile and beneficial amino acid that can support various aspects of health and wellness, particularly for athletes and active individuals.