CoQ10 — The No. 1 Supplement Recommended by Cardiologists

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  • Coenzyme Q10 (CoQ10) and the reduced version, ubiquinol, are among the most popular supplements for mitochondrial health. It’s also the No. 1 supplement recommended by cardiologists to all patients
  • Anyone taking a statin drug to lower their cholesterol must take a CoQ10/ubiquinol supplement to protect their health, especially their heart health, as statins deplete your body of CoQ10
  • Ubiquinol — the reduced, electron-rich form of CoQ10 that your body produces naturally — facilitates the conversion of energy substrates and oxygen into biological energy and is critical for mitochondrial health
  • Taking a CoQ10/ubiquinol supplement helps protect your mitochondrial membranes from oxidative damage, and has been shown to be helpful for a number of health conditions and chronic diseases rooted in mitochondrial dysfunction
  • Recent animal research suggests ubiquinol also has neuroprotective benefits that can improve your chances of recovery in case of a traumatic brain injury

By Dr. Mercola

According to the industry publication New Hope,1 coenzyme Q10 (CoQ10) and the reduced version, ubiquinol, are among the most popular supplements for mitochondrial health. Between 2000 and 2016, the number of Americans using CoQ10 increased from 2 million to 24 million, and the number of brands featuring CoQ10 has increased from 18 brands to 125.

This rapid growth suggests people are becoming increasingly familiar with the importance of mitochondrial health, which is great news. Even better, a recent poll2,3 reveals CoQ10 is now also the No. 1 supplement recommended by cardiologists for all patients. For years, I’ve warned that anyone taking a statin drug to lower their cholesterol really must take a CoQ10 supplement — or better yet, ubiquinol, which is the active, reduced form — to protect their health, especially their heart health.

In the past, few doctors, including cardiologists, would warn their patients of the fact that statins deplete your body of CoQ10 (and other important nutrients, including vitamin D). It appears this may now be slowly changing. Your body also produces less ubiquinol with advancing age, which is why supplementation is recommended even if you’re not on a statin drug.

Why CoQ10 Is so Important for Optimal Health

Ubiquinol — the reduced, electron-rich form of CoQ10 that your body produces naturally — plays an important role in the electron transport chain of your mitochondria, where it facilitates the conversion of energy substrates and oxygen into the biological energy (adenosine triphosphate or ATP) needed by your cells for life, repair and regeneration.

It’s a fat-soluble antioxidant, meaning it works in the fat portions of your body, such as your cell membranes, where it mops up potentially harmful byproducts of metabolism known as reactive oxygen species. Taking this supplement helps protect your mitochondrial membranes from oxidative damage, and this in turn has been shown to be helpful for a number of health conditions and chronic diseases.

This is to be expected, since many conditions, including heart disease and migraines — for which CoQ10 has been found beneficial — appear to be rooted in mitochondrial dysfunction. CoQ10 is used by every cell in your body, but especially your heart cells. Cardiac muscle cells have up to 200 times more mitochondria and hence 200 times higher CoQ10 requirements than skeletal muscle.

Low CoQ10 levels have also been detected in people with certain types of cancer,4 including lung, breast and pancreatic cancer, as well as melanoma metastasis, further strengthening the metabolic theory of cancer. The word “coenzyme” also provides a clue to its importance; it works synergistically with other enzymes to digest food, for example.

It also has the ability to increase your body’s absorption of important nutrients. More specifically, it helps recycle vitamins C and E, thereby maximizing their beneficial effects. The video above is a rerun of my interview with Robert Barry, Ph.D., a prominent CoQ10 researcher, in which he discusses the many reasons for taking CoQ10.

CoQ10 Plays an Important Role in Heart Health

Research shows CoQ10 is particularly important for heart- and cardiovascular conditions, including congestive heart failure5 and high blood pressure.6 Research also suggests CoQ10 can aid recovery after bypass and heart valve surgeries.7 I personally think all heart failure patients should be on ubiquinol. To me, not doing this is medical negligence.

When it comes to heart health, a more general benefit is that ubiquinol also acts as an antioxidant in your blood, where it prevents the oxidation of LDL cholesterol, thereby helping prevent atherosclerosis. A 2015 study8,9,10 found that older individuals who took a combination of CoQ10 and selenium daily for four years suffered fewer heart attacks, required fewer days in the hospital and had lower all-cause mortality. They also reported higher quality of life, compared to controls who received a placebo.

Remarkably, over the course of a decade — even though they’d stopped taking the supplements after four years — heart disease related deaths were nearly 50 percent lower in the original treatment group, and all-cause mortality was still 18 percent lower than controls. While CoQ10 is known to protect heart health all on its own, selenium aids your body in producing and accumulating CoQ10 by serving as a "booster."

Ubiquinol/CoQ10 also helps quell inflammation. Ubiquinol has been shown to have a positive effect on two inflammation markers, NT-proBNP and gamma-glutamyl transferase (GGT), the latter of which is an early marker for heart failure. Levels of these markers are reduced and the genes linked with them are downregulated with ubiquinol supplementation. This can lower your risk not only for heart problems but also any number of other conditions associated with chronic inflammation.

CoQ10 Helps Prevent Statin-Induced Diabetes

By depleting your body of CoQ10, statin drugs not only increase your risk for heart problems, they also significantly increase your risk of diabetes.11 Rosuvastatin (Crestor), for example, is associated with a 27 percent increased risk of Type 2 diabetes.12 According to one 2011 meta-analysis,13 the higher your statin dose, the greater your risk of drug-induced diabetes.

The “number needed to harm” for intensive-dose statin therapy was 498 for new-onset diabetes — that’s the number of people who need to take the drug in order for one person to develop diabetes. In even simpler terms, 1 in 498 people who are on a high-dose statin regimen will develop diabetes.

As a side note, the “number needed to treat” per year for intensive-dose statins was 155 for cardiovascular events. This means 155 people have to take the drug in order to prevent a single person from having a cardiovascular event. Supplementing with ubiquinol or CoQ10 can help reduce this risk by improving mitochondrial function and hence insulin signaling. As noted in Life Extension Magazine:14

“By design, statins interfere with the production of new cholesterol molecules by blocking an enzyme called HMG-CoA reductase. But in the process, they also block a precursor of CoQ10, interfering with its natural production and resulting in lower CoQ10 blood levels. Making matters worse, lowering LDL cholesterol impairs CoQ10 transport into cells.

The combination of these effects has been shown to directly reduce blood levels of CoQ10 by as much as 54 percent. Diabetic patients already have lower-than-normal CoQ10 levels. That’s because their body uses up much of its CoQ10 stores in an effort to combat diabetes-induced oxidative stress. When diabetics are prescribed statin drugs … the further depletion of CoQ10 can be especially harmful.”

Other Health Benefits of CoQ10

Research reveals ubiquinol and CoQ10 is helpful for an array of different conditions and diseases, including but not limited to:15,16

Traumatic brain injury. Recent animal research suggests ubiquinol has neuroprotective benefits that can improve your chances of recovery in case of a traumatic brain injury. The study in question explored the effects of ubiquinol on cerebral gene expression when administered prior to traumatic brain injury.

Rats were given either saline or ubiquinol 30 minutes before a traumatic brain injury was induced. Those given ubiquinol fared better than the control group — an effect ascribed to ubiquinol’s ability to positively affect genes involved in bioenergetics and free radical production.

Parkinson's disease. High doses of CoQ10 may be beneficial in the early stages.

Statin-induced myopathy. Evidence shows CoQ10 lowers your risk of developing pain and muscle weakness associated with statin use.

Migraines. CoQ10 has been shown to ease headaches, including migraines, tension, cluster, menstrual and Lyme-related headaches.

Physical performance. CoQ10 is also popular with athletes. Since it’s involved in energy production, it may improve your physical performance. It may also be helpful for those with muscular dystrophy for the same reason.

Infertility. CoQ10 supplementation may also improve fertility in men and women. High levels of CoQ10 are found in semen, and has been directly correlated with sperm count and motility. Research also shows that a higher CoQ10 concentration in sperm cells helps protect sperm membranes from free radical damage.17

Women who want to conceive need to be mindful of their mitochondrial health. As noted in one study,18 “impaired mitochondrial performance created by suboptimal CoQ10 availability can drive age-associated oocyte deficits causing infertility.”

CoQ10 Combats Negative Effects of Many Drugs

CoQ10 supplementation also becomes important if you’re taking certain kinds of drugs, of which statins is but one. If you take any of the following medications you may benefit from a CoQ10 or ubiquinol supplement, as it can help combat the negative effects associated with these drugs:

Acid blockers

Allergy medicines

Antacids

Anti-arrhythmic drugs

Antibiotics

Antidepressants

Blood thinners

Blood pressure drugs

ACE inhibitors

Angiotensin II receptor antagonists

Beta-blockers

Diuretics

Cholesterol reducers (including fibrates)

Diabetes medications

Psychiatric drugs

CoQ10 Versus Ubiquinol

As mentioned, ubiquinol is the reduced version of CoQ10 (aka ubiquinone). They’re actually the same molecule, but when CoQ10 is reduced it takes on two electrons, which turns it into ubiquinol. In your body, this conversion occurs thousands of times every second inside your mitochondria. The flipping back and forth between these two molecular forms is part of the process that transforms food into energy.

Ubiquinol production ramps up from early childhood until your mid- to late 20s. By the time you hit 30, it begins to decline. Young people are able to use CoQ10 supplements quite well, but older people do better with ubiquinol as it’s more readily absorbed. People with a genetic single nucleotide polymorphism (SNP) called NQO1 lack the enzyme required to convert CoQ10 to ubiquinol in their bodies, and they definitely need to use ubiquinol or they won’t get any of the benefits.

Research has shown that Hispanic and Chinese populations are especially prone to having this SNP.19,20,21 There are also genetic tests you can get that can identify whether you have it. For all of these reasons, I typically recommend using ubiquinol, especially if you’re over 40.

How to Regenerate CoQ10 Naturally

Interestingly, recent research shows you can improve your body’s conversion of CoQ10 to ubiquinol by eating lots of green leafy vegetables, which are loaded with chlorophyll, in combination with sun exposure. Once chlorophyll is consumed it gets transported into your blood. Then, when you expose significant amounts of skin to sunshine, that chlorophyll absorbs the solar radiation, facilitating the conversion of CoQ10 to ubiquinol.

You can also improve absorption of CoQ10 from food or supplements by taking it with a small amount of healthy fat such as some olive oil, coconut oil or avocado. To optimize your body’s production of CoQ10, also be sure to eat plenty of:

  • Fatty fish low in contaminants, such as wild-caught Alaskan salmon, sardines, anchovies and herring
  • Grass fed beef and organic pastured poultry
  • Organic, grass fed or pastured organ meats
  • Sesame seeds
  • Broccoli

Suggested Dosing Recommendations

Dosing requirements will vary depending on your individual situation and needs. As a general rule, the sicker you are, the more you need. That said, studies typically cap the dose at 600 mg per day for severely ill people. If you're just starting out with ubiquinol, start with 200 to 300 mg per day. Within three weeks your plasma levels will typically plateau to its optimum level.

In one study, concentrations of ubiquinol increased nonlinearly with dosage over the course of a month, plateauing around levels of 2.6 grams per milliliter (g/mL) at a dosage of 90 mg/day; 3.7 g/mL for a dose of 150 mg/day and 6.5 g/mL for a dose of 300 mg/day, about midway through the month.22 After the first month, you can go down to a 100 mg/day maintenance dose. This is typically sufficient for healthy people.

If you have an active lifestyle, exercise a lot or are under a lot of stress, you may want to increase your dose to 200 to 300 mg/day. Remember, if you're on a statin drug you need at least 100 to 200 mg of ubiquinol or CoQ10 per day, or more. To address heart failure and/or other significant heart problems you may need around 350 mg per day or more. I personally take 300 mg of ubiquinol every day.

Ideally, you’ll want to work with your physician to ascertain your ideal dose. Your doctor can do a blood test to measure your CoQ10 levels, which would tell you whether your dose is high enough to keep you within a healthy range. CoQ10 (or ubiquinol) is also appropriate for those with other chronic diseases besides heart problems, such as diabetes, amyotrophic lateral sclerosis, chronic fatigue, migraines and autism, for example.

Ideally, you'll want to split the dose up to two or three times a day rather than taking it all at once, as this will result in higher blood levels. Other dosing guidelines, as presented by Dr. Stephen Sinatra (a board certified cardiologist, and a prominent expert in the field of natural cardiology) include:

Hypertension: 200 mg/day

World class athletes who need extra ATP turnover: 300 to 600 mg/day

Heart transplant or severe congestive heart failure: 300 to 600 mg/day in divided doses

Arrhythmia: 200 mg/day

Typical athlete: 100 to 300 mg/day

Mitral valve prolapse: a combination of 400 mg magnesium and 100 to 200 mg of ubiquinol per day

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