Supplements
coenzyme Q10 improves sperm parameters
In plain terms: Does CoQ10 improve sperm quality?
Part of: 🧪 coenzyme Q10
Yes for the lab numbers—it consistently raises sperm concentration and motility, though whether that means more pregnancies is far less certain.
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
What the evidence shows
Across multiple network meta-analyses in idiopathic/subfertile men, CoQ10 consistently improves **sperm parameters** — especially concentration and forward motility, often ranking among the top antioxidants. **Caveat:** these are surrogate endpoints; evidence that CoQ10 raises actual pregnancy/live-birth rates is weaker and less consistent, so grade the surrogate strong but the fertility outcome a
The evidence (10)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Michaelsen et al. 2025 · Nutrients | meta-analysis | mixed | moderate | SR/MA of dietary supplements on male infertility incl. pregnancy/live-birth: sperm-parameter gains clearer than hard fertility outcomes (live birth evidence weaker). |
| Akhigbe et al. 2024 · Front Pharmacol | meta-analysis | supports | moderate | SR/MA of RCTs: CoQ10 improved semen quality parameters (and circulating testosterone) vs control. |
| Su et al. 2022 · Adv Nutr | meta-analysis | supports | moderate | Bayesian NMA (18 RCTs, n=1790): CoQ10 increased sperm concentration (MD +5.95) — highest-ranked antioxidant (SUCRA 79.4%); also improved motility. |
| Li et al. 2022 · Front Endocrinol | meta-analysis | supports | moderate | NMA of antioxidants for idiopathic male infertility: CoQ10 among agents improving sperm quality parameters. |
| Chen et al. 2023 · Aging (Albany NY) | meta-analysis | supports | moderate | NMA of non-pharmaceutical interventions: CoQ10 among agents significantly improving sperm forward motility (MD +5.28). |
| Shahid et al. 2021 · Front Pharmacol | meta-analysis | supports | moderate | NMA of pharmacological interventions for male infertility: CoQ10 among effective agents for semen parameters. |
| Fadhil et al. 2023 · F1000Res | RCT | supports | low | RCT: CoQ10 adjuvant to letrozole improved spermiogram results and sex-hormone levels. |
| Ma & Sun 2022 · Eur Rev Med Pharmacol Sci | RCT | supports | low | RCT: CoQ10 + vitamin E improved sperm parameters/hormones in idiopathic infertility (vs L-carnitine comparator). |
| Bakri et al. 2025 · World J Mens Health | meta-analysis | supports | moderate | SR/MA of RCTs in idiopathic male infertility: CoQ10 improves semen parameters vs placebo; dose/formulation/duration explored. |
| Alahmar & Sengupta 2021 · Biol Trace Elem Res | RCT | supports | moderate | RCT (idiopathic OAT, n=70): CoQ10 200 mg/d increased sperm concentration, progressive/total motility and antioxidant capacity. |
Disagree, or know a study we missed?
We grade by evidence, not opinions. The way to weigh in is to point us to a study we haven't cited (check the evidence table above first), or to flag a problem with one we have. Every submission is reviewed; if it holds up, the grade updates and shows in Science Changes Its Mind.
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.