D-Aspartic Acid

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D-Aspartic Acid Synonyms: D-AA, D-Aspartate, DAA

A large part of most people’s fitness journey is seeking energy and muscle gain. These kinds of benefits to fitness can only be fully unlocked with the aid of proper nutrition. D-Aspartic Acid is a very interesting nutrient since it can be added as an important building block towards the energy and muscle gain that many people are looking for.

What is D-Aspartic Acid (DAA Supplement)?

D-Aspartic Acid is an alpha amino acid found in a variety of foods like lunch meat, avocados, sprouts, and molasses. Aspartic acid is one of the amino acids that build protein used in the structure of the human body. It is predominantly found the pituitary gland and testes where it is produced via D-Aspartate racemase. [1]

There is also evidence that D-Aspartic Acid is important in human neurotransmission and is especially important for sight. [1] Studies of embryos also suggest that D-Aspartic Acid is integral in the development of the nervous system as a whole. [1]

Science on the matter points to Aspartic acid as an important nutrient in the reproductive process, most likely because it works in the biosynthesis of sex hormones, or because it helps as a neuromodulator. [1]

The D-Aspartic Acid form of Aspartic acid is an effective NMDA agonist which points to its importance in the brain. [2] NMDA receptors are vital to almost all brain function including memory and learning. [2]

While D-Aspartic Acid is available in food and is synthesized in the body, there is some evidence that additional supplementation can create desirable effects. [1]

D-Aspartic Acid (DAA) Supplement Benefits

The primary interest in D-Aspartic Acid is centered around its role in the regulation and release of testosterone in the human body.

Supplementation of D-Aspartic Acid is linked to an increase in synthesis of testosterone which continues for some time after finishing supplementation. [1] These promising results are probably due to the fact that the D-Aspartic Acid collects in the male testes and continues to boost testosterone synthesis even when the supplementation has stopped. [1]

The D-Aspartic Acid form is much more bioactive than its L-aspartate cousin both in increasing testosterone and in brain activity. [1] [2]

DAA (D-Aspartic Acid) Supplement Side Effects

When taken as directed, no significant side effects have been reported.

DAA Supplement Dosage

D-Aspartic Acid is most commonly taken in the 2-5 gram per day range. If you are taking it on a workout day, maybe try taking DAA supplement thirty minutes to an hour before working out.

D-Aspartic Acid Supplement Sources

  1. 1. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2774316/?tool=pmcentrez
  2. Bai Donglin, et al. “D-Aspartate And NMDA, But Not L-Aspartate, Block AMPA Receptors In Rat Hippocampal Neurons.” British Journal of Pharmacology 145.4 (2005): 449-459. Academis Search Elite. Web. 30 Aug. 2012.


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