L-Isoleucine is an essential amino acid. Amino acids are the building blocks of protein. Because the body cannot make L-Isoleucine on its own, it must be obtained from food or dietary supplements. L-Isoleucine is found naturally in protein-rich foods such as meat, fish, eggs, dairy products, legumes, and nuts.
L-Isoleucine plays a role in muscle metabolism and energy production. It is involved in helping the body form hemoglobin and may help regulate blood sugar levels by influencing how the body uses glucose. L-Isoleucine also supports tissue growth and repair, particularly in muscle tissue.
People most commonly use L-Isoleucine for improving athletic performance, supporting muscle recovery, and preventing muscle breakdown. It is also used for conditions such as low blood sugar and certain metabolic disorders.