CoQ10 and Blood Lipids: What Clinical Studies Measured

Clinical trials show that CoQ10 supplements produce small and inconsistent changes in blood lipids. The largest pooled analysis, 50 randomized trials, found modest drops in total cholesterol, LDL and triglycerides and a slight rise in HDL, while smaller analyses in specific groups found mixed results. CoQ10 is best understood as a nutrient involved in cellular energy, not as a way to change your lipid numbers.

Key Takeaways

A 2022 meta-analysis of 50 trials (2,794 adults) measured average changes of about 3 mg/dL for LDL and 9 mg/dL for triglycerides, with HDL up by under 1 mg/dL.
Other meta-analyses disagree on which lipid measures moved, and the trials vary widely in dose, length and who took part.
Studies have used roughly 90 to 390 mg a day; the 2022 analysis saw its largest effects at 400 to 500 mg a day.
CoQ10 is fat-soluble and is absorbed best with a meal that contains some fat.
Side effects are usually mild, but CoQ10 can interact with some prescription medicines, so check with your clinician or pharmacist first.

Evidence grade: Moderate. Several meta-analyses of randomized trials point to small lipid changes, but the effects are modest, inconsistent between analyses and drawn from short, varied trials.

Woman holding a softgel supplement and a glass of water

What CoQ10 Is and Why Lipids Were Studied

Coenzyme Q10 (CoQ10) is a substance your body makes on its own. The highest levels are in the heart, liver, kidneys and pancreas. It is sold in the United States as a dietary supplement.

CoQ10 has two well-known jobs. It carries electrons in the mitochondria, the part of the cell that makes energy, and its reduced form, ubiquinol, works as an antioxidant in cell membranes. Tissue levels fall as people age. Because CoQ10 is fat-soluble, works as an antioxidant and is linked to energy metabolism, researchers have asked whether supplements change standard blood lipid measures. For the chemistry behind those roles, see our guide to the structure of ubiquinone.

What the Lipid Meta-Analyses Measured

A meta-analysis pools the results of many trials. Five recent ones looked at CoQ10 and blood lipids. They do not all agree.

Analysis	Who was studied	What changed	What did not change
Liu et al., 2022	50 randomized trials, 2,794 adults	Total cholesterol about 5.5 mg/dL lower, LDL about 3 mg/dL lower, triglycerides about 9 mg/dL lower, HDL about 0.8 mg/dL higher	Results varied a lot between trials
Jorat et al., 2018	8 trials, 526 adults with coronary artery disease	Total cholesterol lower, HDL higher	LDL, lipoprotein(a) and triglycerides
Sharifi et al., 2018	21 trials, 1,039 adults with metabolic conditions	Triglycerides lower	Total cholesterol, LDL and HDL
Suksomboon et al., 2015	7 trials, 356 adults with diabetes, 12 weeks or longer	Triglycerides slightly lower	LDL and HDL
Patiño-Cardona et al., 2024	Umbrella review of published meta-analyses	Possible effects on several lipid measures	Lipid results were less consistent than other outcomes

How Big Are These Changes?

The changes are small. In the largest analysis, average LDL fell by about 3 mg/dL and HDL rose by less than 1 mg/dL. The researchers also reported high variation between trials, which means the pooled average hides very different results. Some trials found larger changes and others found none.

The studies also differ in who took part. Three of the five analyses looked only at adults who already had a heart, metabolic or blood-sugar condition. Results from those groups may not apply to healthy adults.

Does the Dose Matter?

The 2022 analysis tested whether effects grew with dose. Total cholesterol changed most at 400 to 500 mg a day, and the pattern was not a straight line. That is more than most single-capsule products provide. Because the trials were not designed to compare doses directly, this finding is a lead for future research rather than a dosing rule.

How Much CoQ10 Studies Have Used

There is no official recommended intake for CoQ10. According to the National Cancer Institute, human studies have usually used 90 to 390 mg a day, and CoQ10 is absorbed best with fat. Your diet supplies much less: average intake from food is only about 3 to 6 mg a day, mostly from meat, fish, nuts and some oils.

OPA CoQ10 Ubiquinone provides 200 mg of CoQ10 as ubiquinone in one capsule, with a cellulose vegetable capsule and rice flour as the other ingredients. A bottle holds 30 capsules, a 30-day supply at one capsule a day. That 200 mg sits inside the 90 to 390 mg range most studies used. It is below the 400 to 500 mg range where the 2022 analysis saw its largest change in total cholesterol, so it would be inaccurate to expect the same results from it. It is made for cellular energy and antioxidant support, not to change lipid numbers.

The label suggests one capsule 20 to 30 minutes before a meal with water. Because CoQ10 is fat-soluble, taking it close to a meal that contains some fat fits what is known about its absorption. Our guide to the best time to take CoQ10 covers timing in more detail.

Ubiquinone or Ubiquinol?

Supplements come in two forms. Ubiquinone is the oxidized form used in most research. Ubiquinol is the reduced form. In a small 2014 study of 12 healthy adults, 200 mg a day of ubiquinol raised blood CoQ10 more than the same dose of ubiquinone (4.3 vs 2.5 µg/mL after four weeks). Both forms raised levels well above baseline. Higher blood levels have not been shown to translate into larger lipid changes. Our CoQ10 guide to ubiquinone vs ubiquinol compares the two in depth.

Food Sources of CoQ10

Meat, fish, nuts and some oils are the richest food sources. Dairy, vegetables, fruit and cereals contain much less. Even a diet rich in these foods supplies only a few milligrams a day, far below the amounts used in supplement trials. See how to get CoQ10 naturally for a food-by-food look.

Safety and Interactions

No serious side effects of CoQ10 have been reported. Mild insomnia and digestive upset can occur, and the National Cancer Institute notes that doses of 100 mg a day or more caused mild insomnia in some people. Other reported effects include nausea, heartburn, headache, dizziness and rash. Long-term use of 300 mg a day has been linked to raised liver enzymes without reported liver damage.

Warfarin: CoQ10 may reduce the body's response to this blood thinner. Talk to your doctor before starting CoQ10 if you take warfarin.
Insulin and other glucose-lowering medicines: CoQ10 may lower insulin needs. Talk to your doctor or pharmacist first.
Blood pressure medicines and beta-blockers: ask your pharmacist whether CoQ10 is suitable alongside them.
Cancer care: CoQ10 may not be compatible with some chemotherapy or radiation treatments. Check with your oncology team.

Statins and CoQ10

Statins can lower the body's CoQ10 levels. A 2015 meta-analysis of placebo-controlled trials confirmed lower blood CoQ10 with statins, although the clinical importance of that drop is unclear. Trials on whether CoQ10 helps with statin-associated muscle symptoms disagree: a 2018 analysis of 12 trials found lower symptom scores, while a 2015 analysis of 6 trials found no significant effect, and the NIH's complementary health center says the overall evidence does not support it. If you take a statin, talk to your doctor or pharmacist before adding CoQ10, and never change or stop a prescribed medicine on your own. Our list of medications that may interact with CoQ10 covers more detail.

If you are pregnant or breastfeeding, talk to your healthcare provider before taking CoQ10.

Frequently Asked Questions

Does CoQ10 lower LDL?

Only slightly, if at all. The largest meta-analysis found an average drop of about 3 mg/dL, while three smaller analyses found no significant change in LDL. CoQ10 is not designed to change LDL, so follow the lipid plan your clinician recommends.

Does CoQ10 raise HDL?

Some analyses found a small rise. The 2022 meta-analysis measured less than 1 mg/dL on average, and a 2018 analysis in adults with coronary artery disease also found higher HDL. Two other analyses found no significant change.

How much CoQ10 did lipid studies use?

Doses in human studies usually ranged from about 90 to 390 mg a day. In the 2022 dose analysis, the largest change in total cholesterol appeared at 400 to 500 mg a day. Ask your clinician before taking high doses.

How long might CoQ10 take to affect blood lipids?

The trials ran for weeks to months, and one analysis included only trials of 12 weeks or longer. Any change, where it appears, has been small.

Can I take CoQ10 on an empty stomach?

You can, but it is absorbed best with fat. Taking it with or shortly before a meal that contains some fat is the better habit.

Can I get enough CoQ10 from food?

Food supplies about 3 to 6 mg a day on average, which is far less than the 90 mg or more used in studies. Meat, fish, nuts and some oils are the best sources.

Sources

Disclosure: OPA Nutrition sells supplements, including products mentioned in this article. This content is for education only and is not medical advice. Statements about dietary supplements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Talk to your healthcare provider before using any supplement, especially if you take medication or have a medical condition.

Written and reviewed by Michael Gonzales, Founder, OPA Nutrition · Last reviewed: October 17, 2026 · How OPA researches and writes

CoQ10 and Blood Lipids: What Clinical Studies Measured

Key Takeaways

What CoQ10 Is and Why Lipids Were Studied