NutriStack
Ashwagandha and Pregnenolone, a caution.
Both pregnenolone and ashwagandha influence stress hormone and HPA axis activity, with ashwagandha lowering cortisol while pregnenolone is a precursor to multiple steroid hormones, so the net hormonal effect of combining them is hard to predict.
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 Pregnenolone
- Pair type
- Caution
- Evidence (highest tier)
- Emerging
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Caution · Emerging evidence
Caution
What is happening. Both pregnenolone and ashwagandha influence stress hormone and HPA axis activity, with ashwagandha lowering cortisol while pregnenolone is a precursor to multiple steroid hormones, so the net hormonal effect of combining them is hard to predict.
Mechanism. Ashwagandha withanolides modulate the HPA axis and reduce cortisol output, while pregnenolone feeds steroidogenesis, so co-use can shift the balance of cortisol and other steroid hormones in unpredictable ways.
Recommendation. Use the combination cautiously and monitor for changes in mood, sleep, or hormone-related symptoms, especially with thyroid or adrenal conditions.
Sources (2)
- Chandrasekhar K et al, A prospective study of the efficacy of ashwagandha in reducing stress and anxiety, Indian Journal of Psychological Medicine, 2012
- Roberts E, Pregnenolone neurosteroid actions, Biochemical Pharmacology, 1995
Stack Score
How this pair moves the number.
Effect on the composite score
If both Ashwagandha and Pregnenolone are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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