CoQ10 (Ubiquinol)

CoQ10 is an antioxidant involved in cellular energy production. A few small trials in people with PCOS, some using clomiphene, have reported effects on ovulation or hormone and insulin markers, but the evidence is limited and there is no proof that it improves pregnancy rates. It should not replace PCOS care from a clinician.

People with PCOS who are discussing options with a clinician or fertility specialist. Whether it suits you depends on your health, medicines and test results — ask a clinician.

Trials have used roughly 100–600 mg daily. This is not a recommendation. Doses vary by product and person; this is not personal medical advice.

Studies generally lasted about 2–3 months.

Stomach upset, insomnia, headache and rash have been reported.

Stop when pregnancy is confirmed unless your provider advises otherwise. Check with your doctor if you take blood thinners or blood-pressure medicines.

Evidence level (our editorial summary, not a formal grading): Limited.

Pregnancy & breastfeeding: Not enough safety data in pregnancy; stop and ask your provider if you become pregnant.

Medication interactions: May reduce the effect of warfarin and may lower blood pressure; discuss with your doctor.

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