The Short Version
Male factor contributes to 40–50% of infertility cases, and targeted supplementation can improve sperm parameters in 2–3 months. The evidence-backed stack: CoQ10 (200–400mg), zinc (30mg), selenium (200mcg), vitamin C (500–1,000mg), vitamin E (400 IU), L-carnitine (2g), and folate (400mcg). Three months minimum — that's how long spermatogenesis takes.
Why Supplements Help Male Fertility
Sperm cells are uniquely vulnerable to oxidative stress — their cell membranes are rich in polyunsaturated fats that are easily damaged by reactive oxygen species (ROS). Antioxidant supplementation can reduce this oxidative damage, improving count, motility, morphology, and DNA integrity. A Cochrane review of 61 trials found that antioxidant supplementation in subfertile men was associated with improved clinical pregnancy rates.
The Core Stack
| Supplement | Dose | Mechanism | Evidence |
|---|---|---|---|
| CoQ10 (ubiquinol) | 200–400mg daily | Mitochondrial energy, antioxidant in seminal plasma | Moderate — improves motility and morphology |
| Zinc | 30mg daily | Essential for testosterone production and sperm development | Strong — deficiency clearly impairs parameters |
| Selenium | 200mcg daily | Protects sperm DNA, supports motility | Moderate |
| Vitamin C | 500–1,000mg daily | Antioxidant, protects sperm DNA from fragmentation | Moderate |
| Vitamin E | 400 IU daily | Lipid-soluble antioxidant, protects sperm membranes | Moderate |
| L-Carnitine | 2g daily | Energy metabolism in sperm, improves motility | Moderate |
| Folate | 400mcg daily | DNA synthesis, reduces sperm aneuploidy | Moderate |
What Not to Take
Testosterone supplementation — whether prescribed for "Low T" or taken illicitly — shuts down sperm production. Exogenous testosterone tells the brain to stop producing FSH and LH, which are essential for spermatogenesis. If you're taking testosterone (TRT, anabolic steroids, prohormones), inform your fertility specialist immediately. Recovery of sperm production after discontinuation can take 3–12 months, and in some cases doesn't fully recover.
Critical
If your partner is on testosterone replacement therapy (TRT), this is potentially the most impactful single factor in your fertility picture. Discontinuing TRT and switching to alternatives (clomid, hCG) under medical supervision can restore sperm production — but it takes time.
Timeline for Results
Spermatogenesis takes approximately 74 days. Any supplement changes need at least 3 months to show up on a repeat semen analysis. Start now, be consistent, and retest at 90 days. Most men see measurable improvement in at least one parameter.