D-Aspartic Acid
Amino acid involved in testosterone synthesis signalling; evidence is mixed & may only benefit those with below-normal T.
Evidence last reviewed: 04 Apr 2026
- •those with normal testosterone levels
- •individuals prone to acne
- •athletes seeking performance enhancement
Research shows mixed results, particularly in men with sub-normal testosterone levels. Some studies indicate a potential 30–40% increase, but trained athletes often see no benefit or a decline.
Testosterone levelsMen with sub-normal T; sedentary men · RCTs (conflicting)Low
Some studies show ~30–40% T increase in low-normal men; trained athletes show no benefit or even slight decline.
Hormonal Balance for Men
Combining D-Aspartic Acid with Boron can support hormonal balance and testosterone levels in men. D-Aspartic Acid is known to boost testosterone production, while Boron enhances the bioavailability of testosterone.
Forms & usage▾
Take 3 grams daily, preferably in the morning.
Safety & trade-offs3▾
Testosterone benefit attenuates after ~2 weeks of continuous use in many individuals
May worsen acne in testosterone-sensitive individuals
No benefit in well-trained men with normal testosterone — effect limited to those with sub-optimal baseline T
●High ●Moderate ● Low / note