CoQ10 Supplements (2026): What the Evidence Shows and What to Buy

Your body makes CoQ10. No source we read shows that healthy people benefit from a supplement. The best evidence is in heart failure, where one large trial found fewer serious heart events, though NIH calls the heart-failure research inconclusive. In migraine it is rated possibly helpful. NIH says it does not help Parkinson’s symptoms, and it probably does not meaningfully lower blood pressure. The heart-failure and migraine trials used 300 mg a day. Read the cautions before you start.

By Erin Rose Updated October 12, 2026 Sources

What CoQ10 is

CoQ10 is a substance your body makes, with the highest levels in the heart, liver, kidneys and pancreas (NIH). People with some diseases have lower levels, which is why researchers test supplements (NIH). We found no official daily amount or upper limit.

What it helps with, and what it doesn’t

Heart failure: one large trial, promising but not settled. In 420 people with heart failure, 300 mg a day for 2 years, added to standard care, cut serious heart events from 26% to 15% (Mortensen 2014). NIH calls the research in heart failure inconclusive. A 2021 Cochrane review (a group that pools trials) rates the death result from this one trial, and fewer hospital stays, as moderate-quality evidence. It still says there is “no convincing evidence to support or refute” CoQ10 for heart failure. Because it was tested added to standard care, take it with your heart doctor’s OK.
Migraine: possibly helpful. US neurology guidelines rate CoQ10 “possibly effective” for preventing migraine (Holland 2012). In one trial, 300 mg a day halved attacks in 48% of people, against 14% on a placebo (Sándor 2005). Reviews disagree on how much it helps.
Statin muscle pain: studies disagree. One review found less muscle pain (Qu 2018); another found no significant benefit (Banach 2015). NIH says the evidence does not support it.
Blood pressure: probably not. A Cochrane review of 2 trials with 50 people found no meaningful effect (Ho 2016). NIH says it probably does not have a meaningful effect.
Parkinson’s: no. A large NIH-funded trial found no benefit (QE3 2014; NIH).
Energy and aging: we found no good evidence.

How long it takes

The trials ran for months, not days: about 3 months in the migraine trial (Sándor 2005) and 2 years in the heart-failure trial (Mortensen 2014), where the short-term measures at 16 weeks did not change.

When and how to take it

CoQ10 dissolves in fat, and most labels say to take it with a meal. We did not look for studies on time of day. See how much to take, or see which form absorbs best.

Side effects and cautions

NIH reports mild side effects and no serious ones. NIH also says CoQ10 may interact with warfarin and insulin. See the full cautions and doses.

Which CoQ10 to buy

1 of the 10 CoQ10 supplements we score is on a public testing list: our pick, at the top of the page. By need:

Nutricost CoQ10 200 mg (60 capsules)

8.5/10 $0.30 per 200 mg Not on a testing list

Lowest cost per 200 mg: 200 mg of CoQ10 a capsule (the label doesn’t name the form), $0.30 a capsule. The brand says an outside lab tests it, but it is not on a public list.

Buy Nutricost CoQ10 200 mg (60 capsules) on Amazon
Qunol Ubiquinol Extra Strength 200 mg (60 softgels)

7.0/10 $0.67 per 200 mg Not on a testing list

If you want ubiquinol (a form your body also makes from ubiquinone, the standard form): 200 mg a softgel, $0.67 a softgel. Not on a public testing list. Ubiquinol’s edge is uncertain, and it costs 1.1 to 2.2 times as much per 200 mg as the standard products.

Buy Qunol Ubiquinol Extra Strength 200 mg (60 softgels) on Amazon

See all 10 we score, with each score, cost per 200 mg and testing list. For the form question, read ubiquinol vs ubiquinone.

CoQ10 guides

How much and which form

Which product

How we checked this

Products. We read 12 CoQ10 products and could score 10; 2 are not scored (Puritan's Pride CoQ10 200 mg and Kirkland Signature CoQ10 300 mg). Scores rebuilt October 30, 2026. See every score, and why two are not scored.

Testing lists. USP Verified (our copy of September 22, 2026), NSF/ANSI 173 and NSF Certified for Sport (our copies).

Prices. Each brand’s own list price, or Vitacost where the brand’s store blocked our reads. Amazon’s price can differ.

NIH. NIH has no dietary fact sheet for CoQ10; its health page was last updated in January 2019.

Sources

NIH National Center for Complementary and Integrative Health. Coenzyme Q10 (last updated January 2019; read October 12, 2026).
Mortensen SA, et al. The effect of coenzyme Q10 on morbidity and mortality in chronic heart failure (Q-SYMBIO). JACC Heart Fail. 2014. PubMed 25282031. Al Saadi T, et al. Coenzyme Q10 for heart failure. Cochrane Database Syst Rev. 2021. PubMed 35608922
Holland S, et al. Evidence-based guideline update: NSAIDs and other complementary treatments for episodic migraine prevention in adults. Neurology. 2012. PubMed 22529203. Sándor PS, et al. Neurology. 2005. PubMed 15728298
Qu H, et al. J Am Heart Assoc. 2018. PubMed 30371340. Banach M, et al. Mayo Clin Proc. 2015. PubMed 25440725
Ho MJ, et al. Blood pressure lowering efficacy of coenzyme Q10 for primary hypertension. Cochrane Database Syst Rev. 2016. PubMed 26935713
Parkinson Study Group QE3 Investigators. JAMA Neurol. 2014. PubMed 24664227

This page is for information. It is not medical advice.