SupplementsAntioxidantsCoQ10
CoQ10
coenzyme Q10, as ubiquinone
A spark plug for your cells that your body makes less of as you age, and one that statins are known to lower.
- Builds up
- About 2 weeks
- In your body
- About 33 hours
- Per 1 capsule
- 200 mg
- 30-day supply
- $10.99One capsule a day, plus packing and delivery
What is coq10?
CoQ10, short for coenzyme Q10, is a fat-soluble compound your body makes itself. It's in most of your tissues, with the most in your heart, liver, kidneys and pancreas. Those are organs that never get a day off.
It has two jobs. Inside mitochondria, the power plants in your cells, it helps turn food into energy. It also works as an antioxidant, helping to protect your cells from wear.
Most of your organs hold their peak amount at around age 20, then slowly lose it. One review puts blood levels at 65 at about half of what they were at 25. Ours holds 200 mg as ubiquinone in a vegan capsule.
What it does
- EnergyHelps your cells turn food into energy.
- HeartSupports normal heart muscle function.
- AntioxidantProvides antioxidant support.
- Muscle energyPart of how your muscle cells make energy.
These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.
What people take it for
Some evidenceHeart strengthIn a 2-year study of people with heart failure on their usual medicines, serious heart events happened to 15% on 300 mg a day and 26% without it. NIH still calls the overall research inconclusive.
MixedMuscle aches on a statinStatins lower CoQ10, so the idea makes sense. Some studies found less muscle pain, others didn't, and NIH says the overall evidence doesn't back it up yet.
Some evidenceFertilityStudies in men found better sperm count and movement, mostly after 3 months or more. Women with a low response to IVF also saw better pregnancy odds in studies.
How long it takes
With daily use, your blood level climbs and nearly levels off at about 2 weeks. Changes people actually look for take longer, usually 3 months or more.
- About 6 hoursHighest level in your blood after a capsule
- About 2 weeksDaily levels nearly level off
- 3 months to 2 yearsWhen studies on sperm and heart began to show changes
How long it stays in your body
That's long for a supplement. It peaks about 6 hours after a capsule, and half is still there a day and a half later, which is why levels stack up over days.
What's in a capsule
One capsule holds 200 mg. Studies mostly used 90 to 390 mg a day. The big heart study used 300 mg a day, split into three 100 mg servings.
The fat trick, the form debate, and patience
Why fat helps your gut absorb CoQ10, and whether ubiquinol is really the better form, is in the full guide.
It also asks for patience. The 2-year heart study found no difference at 16 weeks. The difference only showed up at 2 years. People also vary a lot: given the same capsule, some reach much higher levels than others, and nobody quite knows why.
What it interacts with
- WarfarinIt may change how well warfarin works. Reports point in different directions, and one small study found no change. Ask your doctor, and get your INR checked.
- InsulinIt may lower how much insulin you need, so talk to your doctor first.
- TheophyllineThis asthma and lung medicine may clear more slowly with CoQ10, and too much of it can be dangerous. Ask first.
- Cancer treatmentIt may not be compatible with some cancer medicines or radiation, because of how antioxidants work. Ask your care team.
- Beta-blockersThey can hold back some of the reactions CoQ10 takes part in.
- Statins and gemfibrozilThey lower CoQ10 in your blood. Two older diabetes medicines, glyburide and tolazamide, do too.
- Blood pressure medicinesYou'll read that CoQ10 lowers blood pressure. The best review couldn't say either way, but mention it if you take these medicines.
Goes well with
Side effects
- Usually mild: an upset stomach, or trouble sleeping at 100 mg a day or more.
- Less often: rash, nausea, upper belly pain, dizziness, heartburn, headache, irritability or tiredness.
- Liver numbers rose in some people on 300 mg a day for a long time, without any liver damage reported.
Check first if
- Warfarin, insulin or theophylline: talk to your doctor first.
- Cancer treatment: ask your care team first.
- Pregnancy or breastfeeding: we found little safety data, so check with your doctor.
The blood tests that go with it
- INRHow long your blood takes to clot, and the number to watch if you take warfarin.
- CKShows muscle stress. CoQ10 eased statin muscle symptoms in some studies, but CK itself didn't move.
- ALTA liver check, since liver numbers rose in some people on larger amounts.
- hs-CRPLow-level inflammation. Studies found a small drop.
- TriglyceridesStudies found a small drop, about 6 mg/dL.
- NT-proBNPA heart strain test. It didn't move early on in the big heart study.
- Fasting glucoseWorth watching if you use insulin, because CoQ10 may lower how much you need.
Work it out
Supplementation
Find CoQ10 in a ready-made protocol.
Start from one of these, or add it to your own. Everything comes in one pouch each morning.
Body & skin
Put heart health in focus.
30-day pack · 7 a morning · 210 pills
$84.54 / month
Choose this packLife stages
A broader daily foundation.
30-day pack · 7 a morning · 210 pills
$92.29 / month
Choose this packYour own
Build your own pouch.
Know what you want to take? Pick each ingredient, and we time it through your day.
Build your own
- cGMP-certifiedFacilities
- FDA-registeredFacilities
- Accredited labsIndependent testing
- Non-GMOIngredient options
- OrganicIngredient options
- VeganFormula options
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.
Want it more precise? Get the app.
A page can only tell you about CoQ10. The app tells you about you: whether it fits, when to take it, and whether it's working.
- Checked against your blood work and everything you already take
- On your daily timeline, around your sleep, training and meals
- Followed over time, so you can see what moved
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Questions
What is CoQ10 good for?
People mostly take it for heart support, muscle aches on a statin, fertility and energy. The research is most interesting for the heart and fertility, and mixed for statin aches.
How long does CoQ10 take to work?
Blood levels nearly level off in about 2 weeks. Fertility studies saw changes after about 3 months. The biggest heart study saw nothing at 16 weeks and a difference at 2 years, so don't expect to feel it fast.
What are the side effects of CoQ10?
Usually mild, like an upset stomach or trouble sleeping. No serious toxicity has been reported, and people tolerated up to 900 mg a day for 4 weeks in one study.
What does CoQ10 interact with?
Mainly warfarin, insulin and theophylline, and it may not suit some cancer treatments. Statins and a few other medicines lower your CoQ10, so tell your doctor if you take one.
Should I take CoQ10 if I'm on a statin?
It's a fair question to bring to your doctor. Statins do lower CoQ10. But studies disagree on whether adding it helps muscle aches. Aches on a statin are always worth reporting, whatever you decide.
Who should not take CoQ10?
Check first if you take warfarin, insulin or theophylline, are having cancer treatment, or are pregnant or breastfeeding.
Can I take CoQ10 every day?
That's how studies gave it, for up to 2 years in the big heart study, and it was well tolerated.
What is the half-life of CoQ10?
About 33 hours. It peaks about 6 hours after a capsule, and takes about a week to mostly clear once you stop.
Does CoQ10 help with migraines?
Possibly. Studies of supplements for migraine found shorter attacks and less pain with CoQ10 in some analyses and not in others, and the evidence is thin. Worth discussing with whoever manages your headaches.
Sources
- NIH National Center for Complementary and Integrative Health. Coenzyme Q10.
- National Cancer Institute. Coenzyme Q10 (PDQ), health professional version.
- Bhagavan HN, Chopra RK. Coenzyme Q10: absorption, tissue uptake, metabolism and pharmacokinetics. Free Radic Res, 2006.
- Bhagavan HN, Chopra RK. Plasma coenzyme Q10 response to oral ingestion of coenzyme Q10 formulations. Mitochondrion, 2007.
- López-Lluch G et al. Bioavailability of coenzyme Q10 supplements depends on carrier lipids and solubilization. Nutrition, 2019.
- Hosoe K et al. Study on safety and bioavailability of ubiquinol after single and 4-week multiple oral administration. Regul Toxicol Pharmacol, 2007.
- Ikematsu H et al. Safety assessment of coenzyme Q10 in healthy subjects. Regul Toxicol Pharmacol, 2006.
- Mortensen SA et al. The effect of coenzyme Q10 on morbidity and mortality in chronic heart failure: Q-SYMBIO. JACC Heart Fail, 2014.
- Qu H et al. Effects of coenzyme Q10 on statin-induced myopathy. J Am Heart Assoc, 2018.
- Kovacic S et al. Effects of coenzyme Q10 supplementation on myopathy in statin-treated patients. J Nutr Sci, 2025.
- Bakri S et al. Efficacy and safety of coenzyme Q10 in idiopathic male infertility. World J Mens Health, 2025.
- Zhang Y et al. Adjuvant treatment strategies in ovarian stimulation for poor responders undergoing IVF. Hum Reprod Update, 2020.
- Kalén A et al. Age-related changes in the lipid compositions of rat and human tissues. Lipids, 1989.
- Mantle D, Hargreaves I. Coenzyme Q10 and degenerative disorders affecting longevity. Antioxidants, 2019.
- Shalansky S et al. Risk of warfarin-related bleeding events associated with complementary and alternative medicine. Pharmacotherapy, 2007.
- Engelsen J et al. Effect of coenzyme Q10 and Ginkgo biloba on warfarin dosage. Ugeskr Laeger, 2003.
- Zhang Z et al. Effects of coenzyme Q10 on lipid, glycemic, and inflammatory markers in metabolic disorders. J Diabetes Res, 2026.
- Ahmed M et al. Comparative efficacy of vitamins and nutraceuticals for migraine prevention. Headache, 2026.
- Peng J et al. Nutritional supplements for migraine prevention. Front Nutr, 2026.
- Ho MJ et al. Blood pressure lowering efficacy of coenzyme Q10 for primary hypertension. Cochrane Database Syst Rev, 2016.
- Memorial Sloan Kettering Cancer Center. Coenzyme Q10.
Written by LifeFrom from these sources, and not yet reviewed by a clinician. Talk to your doctor before starting a supplement.
