L-Isoleucine is an essential branched-chain aliphatic amino acid found in many proteins. It is an isomer of LEUCINE. It is important in hemoglobin synthesis and regulation of blood sugar and energy levels. L-Isoleucine is one of the essential amino acids and is needed for hemoglobin formation and also stabilizes and regulates blood sugar and energy levels. It metabolizes in muscle tissue.
Isoleucine is one of the three branched-chain amino acids. These amino acids are valuable for athletes because they enhance energy, increase endurance, and aid in the healing and repair of muscle tissue. Isoleucine is one of three branched-chain amino acids (the others are valine and leucine) that enhance energy, increase endurance, and aid in muscle tissue recovery and repair. This group also lowers elevated blood sugar levels and increases growth hormone production. Supplemental valine should always be combined with valine and leucine at a respective milligram ratio of 1:2:2.
A deficiency of isoleucine can lead to symptoms similar to hypoglycemia. Supplemental L-isoleucine should always be taken with a correct balance of the other two branched-chain amino acids, L-leucine and L-valine—approximately 2 milligrams each of leucine and valine for each milligram of isoleucine. Food sources for isoleucine include almonds, cashews, and soy protein.