Fertility · Male Factor
Male Fertility Supplements: What Works, What Doesn't
Male factor contributes to roughly half of infertility cases — and unlike egg quality, sperm parameters respond quickly to nutritional intervention. A 90-day stack of evidence-backed supplements can meaningfully improve count, motility, and DNA fragmentation.
The ingredients that have evidence
- L-carnitine 2 g/day — sperm motility (Lenzi 2003, multiple RCTs).
- Zinc 30 mg/day — sperm count and testosterone (Cochrane 2019).
- CoQ10 200 mg/day — sperm concentration and motility (Lafuente 2013).
- Selenium 100 mcg/day — morphology (Safarinejad 2009).
- Ashwagandha KSM-66 600 mg/day — testosterone, count, motility (Ambiye 2013).
What doesn't have evidence (yet)
Maca, tribulus, fenugreek, "test boosters" with proprietary blends — none have consistent peer-reviewed support for fertility endpoints. Save your money.
What else moves sperm
Heat (saunas, laptops on lap, tight underwear) drops counts. Alcohol > 5 drinks/week drops motility. THC and nicotine increase DNA fragmentation. Sleep < 6 hours lowers testosterone. Address these alongside supplementation.
Next steps
Order a baseline semen analysis through your urologist or via direct-to-consumer lab. Start kindr Male Fertility or the Conception Bundle for couples. Retest at 90 days.
Related
Frequently asked questions
How long does it take to see results?
Spermatogenesis takes ~74 days, so plan for a minimum 90-day run before retesting a semen analysis.
Should every man TTC take supplements?
If a semen analysis is normal and you conceive quickly, no. If parameters are borderline, the partner is over 35, or you have been trying 6+ months — yes, the evidence supports it.
Are these safe long-term?
All ingredients in kindr Male Fertility have established safety at the doses used. Ashwagandha should be paused if you have hyperthyroidism.
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Medically reviewed by Dr. Ana Lisa Carr, MD, MBA · Last reviewed 2026-06-23. Compounded medications are prepared by FDA-registered 503A pharmacies and are not FDA-approved drug products.