The amino acids that the body cannot produce, and need to be taken in through the diet or supplementation, are called essential. Leucine is one of these essential amino acids. Leucine provides many benefits because it is also a member of the branched-chain amino acid (BCAA) group, along with isoleucine and valine. BCAAs act as a fuel source for the muscles because they are the only amino acids that are broken down directly in muscle tissue. They prevent the muscle breakdown that normally occurs during strenuous exercise, resulting in increased endurance and muscle strength.

Key Health Benefits of Leucine & BCAA's

Other tissues that BCAAs help to repair are the bones and skin. BCAAs regulate blood sugar by producing glycogen, the storage form of sugar in muscle tissue. Leucine increases the production of the growth hormone. Growth hormone is sometimes referred to as the fountain of youth because it keeps the body “young” by repairing and building tissue. Levels of growth hormone naturally decline as you age and an increase in growth hormone levels protects against the development of age-related conditions. Leucine, and the other BCAAs, can be supplemented for the following conditions: muscle wasting, recovery from surgery, broken bones, and skin diseases and can be used to improve muscle growth during exercise.

Leucine Supplement Varieties & Combinations

The biologically active form of leucine is L-leucine. Branched-chain supplements are the safest way to use leucine. They are available in a variety of ratios. The optimal ratio for normal use is 2:1:1 (leucine: isoleucine: valine). BCAA supplements should be taken half an hour before workouts.

Important Information & Potential Side Effects of Leucine

The branched-chain amino acids must be taken together. High doses of BCAA can cause hypoglycemia and diabetics and individuals with hypoglycemia should use BCAAs with caution. High leucine intake may cause low niacin (pellagra). High leucine intake increases ammonia levels and may be harmful to individuals with kidney disease.