NutriStack
Ashwagandha and D-Aspartic Acid, a synergy.
Both are marketed for supporting testosterone and male reproductive parameters and may act through complementary pathways on the gonadal axis and stress hormones.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Ashwagandha and D-Aspartic Acid
- Pair type
- Synergy
- Evidence (highest tier)
- Emerging
- Source citations
- 2 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Synergy · Emerging evidence
Synergy
What is happening. Both are marketed for supporting testosterone and male reproductive parameters and may act through complementary pathways on the gonadal axis and stress hormones.
Mechanism. D-aspartic acid stimulates luteinizing hormone and testosterone release centrally, while ashwagandha may support testosterone and semen parameters partly by lowering cortisol and oxidative stress in the testes.
Recommendation. Acceptable to combine for those targeting hormonal or fertility support. Evidence is stronger for ashwagandha than for D-aspartic acid in healthy men.
Sources (2)
- Lopresti AL et al., A randomized, double-blind, placebo-controlled study examining the hormonal and vitality effects of ashwagandha in aging men, American Journal of Mens Health, 2019
- Topo E et al., The role and molecular mechanism of D-aspartic acid in the release and synthesis of LH and testosterone, Reproductive Biology and Endocrinology, 2009
Stack Score
How this pair moves the number.
Effect on the composite score
If both Ashwagandha and D-Aspartic Acid are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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