There is a lot of misinformation bouncing around out there on potential ‘testo-boosters’ or ‘sexual performance enhancing supplements’, you name it someone is selling it.

What pisses me off is that it the product and embellished message falls straight into the laps of men in a state of desperation, men who might want to start a family, right through to men who just want to feel ‘normal’. I get it, ‘it’s just business’ right?
Well I disagree, so I will stick firmly to the science on this one chaps…just for clarity.

What it D-Aspartic Acid (D-AA)?

It’s basically an amino acid, but not one of the proteinogenic varieties that go towards making muscle. Instead D-AA is used to support testosterone levels in men (usually men struggling with infertility) and by athletes wanting to increase their capacity to develop lean muscle mass.

According to a study by D’Aniello, A. (2007), D-AA targets the brain, in turn triggering the release of hormones such as luteinizing hormone, follicle-stimulating hormone, and growth hormone…all of the hormones involved in sexual and reproductive health. If taken consistently D-AA can build up in the testes causing a slight rise in testosterone production.

The evidence is quite promising and unlike many commercial ‘Testo-boosters’ out there, D-AA actually appears to be supported by scientific evidence. It is acknowledged that many of the studies look at D-AA’s effect inside the body and not necessarily in supplement form, but bioavailability of D-AA isn’t thought to be an issue so the results can be applied with some degree of confidence.

How much? have kindly done some info gathering for us and concluded that the standard dose for D-AA is between 2,000 – 3,000mg per day. Studies do demonstrate little harm when taking D-AA constantly with no rest period (cycle) whereas others have followed a 2 weeks on, 1 week off cycle. This implies that a cycle may be the best option, how long you give it to cycle off is entirely up to you. If you see benefits initially and after a couple of weeks they subside, perhaps that’s a signal to cycle off for a week.


D’Aniello A. D-Aspartic acid: an endogenous amino acid with an important neuroendocrine role. Brain Res Rev. (2007)

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