D-Aspartic Acid (D-AA) is a non-essential amino acid. That means your body produces a functional amount of it internally.
Amino acids are the building blocks of protein and serve various functions in the body during childhood development and throughout adulthood. D-Aspartic Acid plays a role in metabolic support.* According to one study, D-AA supplementation may also support increased testosterone levels.*
D-AA is formed when the enzyme aspartate racemase converts an L-Aspartic Acid into D-AA in the testes and glands. It is one of 20 proteinogenic amino acids, which are the building blocks of proteins. It was discovered in 1827 by Plisson, a French pharmacist, by boiling asparagus and treating it with hydrochloric acid. (Crazy, right?)
One human study testing D-Aspartic Acid suggested that the amino acid boosted testosterone and luteinizing hormone release when taken over a 12-day period.* D-Aspartic Acid is found naturally in the testes, pituitary gland and hypothalamus, all of which are involved in hormone production. The study found that D-AA has a role in the regulation of the release and synthesis of LH and testosterone in humans.*
Aspartic acid comes in two forms, L and D. The l-aminos build tissue. But when l-aspartic acid combines with enzymes in the testes, it becomes a d-aspartic acid, which supports testosterone levels in the blood and prompts production of more.*
A study discovered that D-Aspartic acid has specific effects on testosterone levels.* The patients in the study took 3 grams of D-AA per day for 6 days, then for 12 days. Researchers surmised that testosterone levels increased in all individuals who the compound being researched.*
Many men over the age of 30 experience diminished testosterone levels. This could lead to increased body fat levels, decreased recovery ability, and problems with sleep. For some men, D-AA may help boost testosterone levels to promote hormone balance.*
D-AA may support your fitness goals, but should be paired with proper diet and exercise.* Read and follow supplement directions carefully.