General Dosage
2-3 g daily, cycled (2-3 weeks on, 1-2 weeks off)
Maximum dose: 6 g/day has been studied but showed a paradoxical decrease in testosterone in one study
D-Aspartic Acid Dosage Guide
This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer
Dosage Recommendations
General recommendation: 2-3 g daily, cycled (2-3 weeks on, 1-2 weeks off)
Timing: Morning on an empty stomach or with breakfast; cycling recommended
Dosage by Condition
Testosterone support (untrained men)
2-3 g daily for 12-28 daysPreliminary
Male fertility
2.66 g daily for 90 daysPreliminary
| Condition | Recommended Dose | Evidence |
|---|---|---|
| Testosterone support (untrained men) | 2-3 g daily for 12-28 days | Preliminary |
| Male fertility | 2.66 g daily for 90 days | Preliminary |
Upper limit: 6 g/day has been studied but showed a paradoxical decrease in testosterone in one study
Timing & Absorption
Morning on an empty stomach or with breakfast; cycling recommended
Can be taken with or without food.
References
- Topo E, Soricelli A, D'Aniello A, et al. (2009). The role and molecular mechanism of D-aspartic acid in the release and synthesis of LH and testosterone in humans and rats. Reproductive Biology and Endocrinology. DOI PubMed
- Willoughby DS, Leutholtz B. (2013). D-aspartic acid supplementation combined with 28 days of heavy resistance training has no effect on body composition, muscle strength, and serum hormones. Nutrition Research. DOI PubMed
- Melville GW, Siegler JC, Marshall PW. (2015). Three and six grams supplementation of d-aspartic acid in resistance trained men. Journal of the International Society of Sports Nutrition. DOI PubMed