CoQ10 has been studied for egg quality — evidence is limited and mixed
🌺 FertilityBy the Bloom Health Woman editorial team · Last updated October 2026 · Educational information, not medical advice. This page contains an affiliate link (see the product box). How we create content
CoQ10 is an antioxidant involved in cellular energy production, and levels decline with age. Some small studies, including in people undergoing IVF, have suggested possible benefits for ovarian response or egg quality, but the evidence is limited and of low certainty, and it is not proven to improve the chance of pregnancy or live birth. It is not a substitute for fertility evaluation.
People trying to conceive who are discussing options with a fertility specialist, particularly if they are older or having fertility treatment. Whether it suits you depends on your health, medicines and test results — ask a clinician.
Studies have used roughly 200–600 mg daily, usually for around 2–3 months. Absorption is better with a fat-containing meal. This is not a recommendation. Doses vary by product and person; this is not personal medical advice.
Studies often used 2–3 months, roughly the time it takes an egg to mature. Benefits are not guaranteed.
Stomach upset, insomnia, headache and skin rash have been reported.
Stop if you become pregnant unless your provider advises otherwise. Avoid or check with your doctor if you take blood thinners.
Evidence level (our editorial summary, not a formal grading): Limited to moderate.
Pregnancy & breastfeeding: Not enough safety data for use during pregnancy; discuss with your provider and stop if you become pregnant unless advised otherwise.
Medication interactions: May reduce the effect of warfarin and may lower blood pressure. Discuss with your doctor if you take blood thinners or blood-pressure medicines.
Talk to a healthcare professional before use if you are pregnant, breastfeeding, planning pregnancy, have a medical condition, take any medicine, or are scheduled for surgery. Dietary supplements are not approved by the FDA for safety or effectiveness before they are sold, and quality varies between products.
Reliable sources to check: NIH Office of Dietary Supplements fact sheets · NCCIH Herbs at a Glance · MedlinePlus Herbs & Supplements · FDA — Dietary Supplements
Optional product link. We have not tested this product and its inclusion is not a medical recommendation or an endorsement of any brand.
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