NutriStack
Testosterone and Zinc, a synergy.
Zinc is essential for testosterone synthesis and metabolism. It inhibits aromatase (preventing testosterone-to-estrogen conversion) and modulates 5-alpha reductase activity (affecting testosterone-to-DHT conversion). In zinc-deficient men, supplementation significantly increases both testosterone and DHT levels. For men on TRT, adequate zinc status optimizes testosterone utilization and may help manage the estrogen/testosterone balance.
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
- Testosterone and Zinc
- Pair type
- Synergy
- Evidence (highest tier)
- Moderate
- Source citations
- 5 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Synergy · Moderate evidence
Synergy
What is happening. Zinc is essential for testosterone synthesis and metabolism. It inhibits aromatase (preventing testosterone-to-estrogen conversion) and modulates 5-alpha reductase activity (affecting testosterone-to-DHT conversion). In zinc-deficient men, supplementation significantly increases both testosterone and DHT levels. For men on TRT, adequate zinc status optimizes testosterone utilization and may help manage the estrogen/testosterone balance.
Mechanism. Zinc inhibits aromatase (CYP19A1), reducing conversion of testosterone to estradiol. It also modulates 5-alpha reductase activity, influencing DHT production. Zinc is a cofactor for multiple enzymes in the steroidogenic pathway and is essential for Leydig cell function and testosterone synthesis. Deficiency reduces luteinizing hormone (LH) and testosterone production.
Recommendation. Ensure adequate zinc intake (15-30 mg/day) while on testosterone therapy. Zinc supplementation is particularly beneficial if zinc-deficient. Monitor testosterone, estradiol, and DHT levels as zinc can affect all three. Excessive zinc supplementation (>50 mg/day) can cause copper deficiency and should be avoided.
Sources (5)
- Netter A et al. Effect of zinc administration on plasma testosterone, dihydrotestosterone, and sperm count. Arch Androl. 1981;7(1):69-73. PMID 7271365
- Om AS, Chung KW. Dietary zinc deficiency alters 5 alpha-reduction and aromatization of testosterone and androgen and estrogen receptors in rat liver. J Nutr. 1996;126(4):842-848. PMID 8613886
- Hsu TJ, Hsieh RH, Huang CH et al.. Efficacy of Zinc Supplementation in the Management of Primary Dysmenorrhea: A Systematic Review and Meta-Analysis.. Nutrients. 2024. PMID 39683510
- Ali AA, Naqvi SK, Hasnain Z et al.. Zinc supplementation for acute and persistent watery diarrhoea in children: A systematic review and meta-analysis.. Journal of Global Health. 2024. PMID 39641338
- Oh C, Keats EC, Bhutta ZA. Vitamin and Mineral Supplementation During Pregnancy on Maternal, Birth, Child Health and Development Outcomes in Low- and Middle-Income Countries: A Systematic Review and Meta-Analysis.. Nutrients. 2020. PMID 32075071
Stack Score
How this pair moves the number.
Effect on the composite score
If both Testosterone and Zinc 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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