How much CoQ10 for fertility and IVF (UK)

If you are asking how much CoQ10 to take for fertility or IVF in the UK, you are usually choosing between 200 mg, 300 mg and 600 mg — not between “a prenatal with CoQ10 on the label” and nothing.

Start with folic acid anyway. Women who could become pregnant should take 400 µg daily through the first 12 weeks, plus vitamin D. CoQ10 is not on that NHS list. If you add it, you are making a nutritional choice in the 90-day window before eggs are ovulated or retrieved — the same window sperm take to develop. Women’s Health has a readable UK explainer on CoQ10 for the mitochondrial story.

What CoQ10 is doing in this conversation

Coenzyme Q10 sits in mitochondrial membranes. Eggs and sperm are energy-hungry cells. As people get older, the research interest is whether extra CoQ10 can support that cellular machinery. UK clinic-adjacent pages typically talk about 200–600 mg/day for at least 8–12 weeks, often three months. Small trials have looked at ovarian response and embryo-related markers. They have not rewritten HFEA patient information. If a consultant has not mentioned CoQ10, that is because there isn’t an NHS protocol for it.

200 vs 300 vs 600 mg

A few milligrams of CoQ10 on a multi is a line on a label, not the 200–600 mg band people discuss in papers. Standalone CoQ10 is often 200 mg. Some all-in-one formulas print 300 mg. 600 mg is the high end of the research conversation, sometimes split through the day. More is not automatically better. Ubiquinol versus ubiquinone is a separate fork. Follow the form on a written protocol if you have one.

The 90-day window

A cohort of follicles takes on the order of three months to mature. If CoQ10 has a nutritional job here, it is during that maturation — not the 48 hours after you remember to open a shopping app. For IVF, that usually means starting around the time you are planning a cycle. Sperm are on a similar clock: roughly 70–90 days. Male partners who only start supplements when injections start have missed most of a production cycle. Lifestyle still leads: sleep, smoking, alcohol, heat and diet. Calendar: IVF supplement protocol, 90 days before retrieval.

How Her Fertility and Him Fertility fit

Both Her Fertility and Him Fertility include CoQ10 at 300 mg in the daily serving — inside the 200–600 mg band people discuss. Her Fertility also includes NAC 400 mg and 5-MTHF 400 µg. Him Fertility also includes zinc 15 mg, selenium 200 µg and ALCAR 250 mg. Do not add a second standalone CoQ10 on top unless a clinician asked. If you are preparing as a couple, the fertility bundle starts both formulas together.

FAQ

Do I need 600 mg if I already take 200–300 mg?

Not by default. 200–300 mg is already inside the band people discuss. Stacking another 300–600 mg on top is a clinician conversation.

Should I take CoQ10 during stimulation and through to transfer?

Ask the clinic. Many people continue until a positive test; some units prefer a shorter list once medicines start.

Is CoQ10 on the NHS for fertility?

No. The NHS preconception vitamins that matter for everyone are folic acid and vitamin D. CoQ10 is a self-funded food supplement.

Read our complete guide: Male & female fertility: the complete UK guide