Source: NIH Office of Dietary Supplements — Zinc — RDA 8–11 mg; 30 mg supplemental (UL 40 mg/day). Zinc only raises testosterone if you're deficient.
Same ingredient as #13 (Zinc) — listed separately for hormone stacks; watch copper balance long-term.
Zinc again — the same essential mineral as #13, listed here for hormone-support formulas.
Cofactor for enzymes involved in testosterone production and immunity.
Same as zinc: take with food, and don't run high doses long-term without copper, or you risk copper deficiency. Upper limit ~40 mg/day.
| Per serving | |
|---|---|
| Typical branded single-ingredient product | $0.17 |
| Bulk powder at the clinical dose (250g, $20.97) | $0.01 |
Buying bulk powder instead of a branded bottle saves about 95% per serving.
Bulk price: $20.97/250g →Educational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-07-21. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.