Best fertility supplements for men

How do the options compare?

Each option is graded against five practical criteria: obstetric guideline support, pregnancy evidence depth, dose transparency, expected onset, and interactions that require provider coordination.

• Coenzyme Q10 is the antioxidant with the most consistent trial support for sperm motility, at doses of roughly 200 to 400 mg a day, but only a handful of the studies reviewed were placebo-controlled and pregnancy-rate data remain sparse. 1
• A review of nine commonly used antioxidants, including zinc, vitamin C, vitamin E, L-carnitine, and selenium, found results inconsistent enough across studies that European guidelines still do not recommend routine antioxidant supplements for infertile men. 2
• In a large NIH-funded randomized trial, men taking 30 mg of zinc plus 5 mg of folic acid daily saw no improvement in live births, pregnancy rates, or sperm parameters compared with placebo, and reported more stomach-related side effects than the placebo group. 3
• A review of 21 market supplements found most combined so many ingredients at such low individual amounts that only about one in ten had a composition likely to work as intended, which is why matching a label to a studied dose matters more than a brand's marketing claims. 4
• In one 30-week trial of 468 men, pairing selenium (200 micrograms a day) with N-acetyl cysteine (600 mg a day) improved sperm concentration, motility, and morphology more than either nutrient reviewed alone, one of the more consistent combination results in the review. 2

Which option makes sense?

The findings above apply to the populations and circumstances studied. They do not establish that every compared option is appropriate for you. Please consult your healthcare provider before acting on this summary.

Disclosure: Pregnancy Smart makes pregnancy supplements, though not in this category. This comparison is a plain description of the pregnancy evidence, not a sales page.