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Ingredient guide

Best time to take CoQ10

Written by the Full Measure editorial team, which sells supplements. Approved for publication by the Full Measure owners. Updated .

Drafted with AI assistance from the sources listed below. How we write these

Quick answer

Take CoQ10 with a meal that contains some fat, since it is absorbed best with fat. If it keeps you awake, try it earlier in the day: mild trouble sleeping has been reported at 100 mg a day or more. In one trial, two 100 mg doses raised blood levels more than one 200 mg dose.1,2

Key facts

  • CoQ10 is slow to absorb, peaking in the blood about 6 hours after a dose.3
  • Preparations made with oil are absorbed better than dry powder.1,2
  • In the dosing trials cited here, people took CoQ10 with meals.2,4
  • What a dose is eaten with may matter: in one small study, miso soup sped up absorption.5

With a meal that has some fat

CoQ10 is absorbed best with fat, and preparations made with oil are absorbed better than the purified compound.1

What a dose is taken with may matter. In 13 people, ubiquinol granules taken in miso soup reached the blood faster, and about 1.5 times more was absorbed over five hours, than when taken in other soups or a raw egg sauce.5

No human study cited here compared CoQ10 taken with food against CoQ10 on an empty stomach. The advice to take it with a meal rests on how fat-soluble compounds are absorbed, and on how the trials were run.1,2,4

The meal may matter most for dry powder capsules, which carry no oil of their own. In the 20-day trial, the same amount of CoQ10 dissolved in oil reached higher blood levels than crystalline powder, even though both were taken with meals.2

One dose or two

In the same 20-day trial, two 100 mg doses a day raised blood levels more than one 200 mg dose. The men were advised to take their capsules with meals.2

So if you take 200 mg or more a day, splitting it between two meals is one option the evidence points to. It comes from a single 20-day trial in 60 men, so it is a modest finding.2

Morning or night?

No study cited here compared morning with evening doses. Because mild trouble sleeping has been reported at 100 mg a day or more, a dose with breakfast or lunch is the cautious choice if you sleep poorly.1

With a half-life of about 33 hours, levels change slowly between doses, so the exact hour matters less than taking it with food each day.3

Timing and your medicines

If you take warfarin, the timing that matters is when you start or stop CoQ10: the warfarin label advises more frequent INR checks at those points. Tell whoever manages your warfarin first.6

If you use insulin, ask whoever prescribes it before starting, since CoQ10 may lower insulin needs.1,7

Questions people ask

Should I take CoQ10 in the morning or at night?

No study compares the two. What matters for absorption is the fat in the meal, so pick a meal you eat every day, and move it earlier if you notice trouble sleeping.1

Is the best time different for ubiquinol?

No study cited here tested timing for ubiquinol. It is fat-soluble like ubiquinone, and in the two-week trial both forms were taken with a main meal, so the same advice applies.1,4

When should I take CoQ10 if I am on a statin?

No source sets a time for CoQ10 alongside a statin. Talk to your prescriber first: statins lower blood CoQ10, yet NIH's complementary health center finds the evidence does not show CoQ10 easing statin muscle pain.7,8

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Sources

  1. PDQ Integrative, Alternative, and Complementary Therapies Editorial Board. Coenzyme Q10 (PDQ): Health Professional Version. National Cancer Institute. Updated October 31, 2024. Opened 2026-10-07.
  2. Singh RB, Niaz MA, Kumar A, Sindberg CD, Moesgaard S, Littarru GP. Effect on absorption and oxidative stress of different oral Coenzyme Q10 dosages and intake strategy in healthy men. Biofactors. 2005;25(1-4):219-224. Opened 2026-10-07.
  3. Bhagavan HN, Chopra RK. Coenzyme Q10: absorption, tissue uptake, metabolism and pharmacokinetics. Free Radic Res. 2006;40(5):445-453. Opened 2026-10-07.
  4. Zhang Y, Liu J, Chen XQ, Chen CYO. Ubiquinol is superior to ubiquinone to enhance Coenzyme Q10 status in older men. Food Funct. 2018;9(11):5653-5659. Opened 2026-10-01.
  5. Takahashi M, Nagata M, Kaneko T, Suzuki T. Miso Soup Consumption Enhances the Bioavailability of the Reduced Form of Supplemental Coenzyme Q10. J Nutr Metab. 2020;2020:5349086. Opened 2026-10-07.
  6. Warfarin sodium tablets: prescribing information (Amneal Pharmaceuticals). DailyMed, U.S. National Library of Medicine. Published June 3, 2026. Opened 2026-10-07.
  7. National Center for Complementary and Integrative Health (NIH). Coenzyme Q10. Last updated January 2019. Opened 2026-10-07.
  8. Qu H, Meng YY, Chai H, et al. The effect of statin treatment on circulating coenzyme Q10 concentrations: an updated meta-analysis of randomized controlled trials. Eur J Med Res. 2018;23(1):57. Opened 2026-10-07.

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.