D-aspartic Acid by Prima Force

D-Aspartic Acid (DAA) is the newest natural testosterone booster on the market. DAA is the D-form of the amino acid aspartic acid. The body can produce DAA from the nonessential amino acid L-aspartic acid (the dietary form of aspartic acid). D-form amino acids, such as DAA, are found in higher concentrations in specific tissues in the body. For example, higher concentrations of DAA are found in the testes, pituitary gland, and hypothalamus (D'Aniello & Di Fiore 2000) all of which are areas involved in hormone production.

What Does D-Aspartic Acid Do?

One big difference between DAA and other natural testosterone booster is there is actually scientific data in HUMANS showing it to effectively increase testosterone levels. A study by Topo et al. showed that supplementing with 3 grams of DAA increased circulating luteinizing hormone (LH) levels by 33% and testosterone levels by 42% in men aged 27-37 years old (Topo & Soricelli 2009). Note that this increase in testosterone was in healthy men with normal testosterone function, not rats or hypogonadal men! Note the increase in testosterone by 42% was after only 12 days of supplementation and testosterone levels returned to baseline three days after stopping DAA.

Due to DAA’s action at the pituitary gland it should also increase growth hormone (GH) levels, though studies have not yet measured DAA’s impact on GH levels. Studies have not yet been done in women, but there is one study done in female lizards that showed DAA supplementation to have no effect on testosterone levels but it did increase estrogen levels (Assisi & Botte 2001). Therefore at this time it appears only men should supplement with DAA.

Further studies need to be done to examine DAA’s affects on estrogen and prolactin levels, but at this time there are no side effects reported with DAA use. DAA is a natural amino acid found in our food supply and produced by the body making it a great tool to naturally increase healthy males testosterone production.

Recommended Dosage

The dosage used in the study showing DAA to increase testosterone levels was 3 gram taken in the morning. However, a five day loading phase of 3g morning and 3g evening would be recommended.