The pill millions take for their heart quietly drains the exact nutrient the heart runs on — and almost no one is told to replace it

Statins are among the most widely prescribed drugs in the world. They are meant to protect heart health. But a growing body of research points to a side effect that standard care rarely addresses.

The same chemical pathway that statins block to lower cholesterol is also needed to make Coenzyme Q10 (CoQ10) — a molecule your cells need to produce energy.

Why This Matters Today

When statins block an enzyme called HMG-CoA reductase to lower cholesterol, they also interrupt the mevalonate pathway (a chain of chemical steps your body uses to build several important molecules). One of those molecules is CoQ10, a fat-soluble antioxidant that your mitochondria (the energy-making parts of your cells) need to produce ATP (the main fuel your cells run on) [PMID: 41521431].

A review found that muscle pain and weakness — known as statin-associated muscle symptoms — affect a meaningful number of statin users. Researchers have proposed that poor mitochondrial function caused by CoQ10 depletion may be one reason why [PMID: 41521431]. The heart is one of the most energy-hungry muscles in the body. It has a very high density of mitochondria, so having enough CoQ10 is especially important for heart function.

Even so, routine CoQ10 supplementation is not currently recommended for all statin users. Studies on whether it helps with statin-related muscle symptoms have produced mixed results [PMID: 41521431].

The Science Behind It

Your cells make ATP through a process called the electron transport chain. This chain runs along the inner wall of your mitochondria. CoQ10 acts as an electron shuttle — it carries electrons between different steps in the chain. Without enough CoQ10, the chain can stall. Electrons may then leak out early and create damaging molecules called free radicals [PMID: 41521431].

When statins block HMG-CoA reductase, they also reduce a building block called farnesyl pyrophosphate, which the body needs to make CoQ10. This chemical bottleneck is thought to be one reason some statin users develop muscle pain and weakness. However, studies on CoQ10 supplements for this problem have shown mixed results — some found symptom relief, others found no meaningful benefit compared to a placebo [PMID: 41521431].

Blood vessel health may also be affected. The endothelium (the thin inner lining of your blood vessels) depends on healthy mitochondria to control how blood vessels widen and narrow. A randomized controlled trial (the strongest kind of study) found that 300 mg of CoQ10 per day for 8 weeks significantly improved a measure of blood vessel flexibility called brachial flow-mediated dilation. It also reduced a blood marker of poor mitochondrial function. This was compared to a placebo, in patients with reduced heart pumping function caused by reduced blood flow [PMID: 21388622]. However, the same trial did not find significant effects on blood pressure, blood fats, or markers of oxidative stress [PMID: 21388622].

A review also notes that strong evidence — including data from the Q-SYMBIO trial — suggests CoQ10 may improve exercise capacity, heart pumping strength, and reduce major heart-related events in people with heart failure (when the heart does not pump blood as well as it should). The review suggests that targeted use in advanced heart failure or in patients with high energy demands on their cells may be justified [PMID: 41521431]. However, the review also cautions that routine supplementation for all statin users is not currently recommended. More evidence and cost data are needed before formal guidelines can follow [PMID: 41521431].

The Complete Protocol

The approaches below are commonly discussed in the context of CoQ10 intake. Talk to a qualified healthcare provider before changing your diet or supplement routine, especially if you take prescription medications.

Dietary sources

• Beef heart: Organ meats like beef heart are among the richer food sources of CoQ10. Gentle cooking methods are generally preferred, since high heat can break down heat-sensitive compounds.
• Sardines: Oily fish like sardines provide CoQ10 along with dietary fats. Because CoQ10 is fat-soluble, eating it with a fat-containing meal may support absorption.

Concentrated food-based sources

• Cold-pressed extra virgin red palm fruit oil is sometimes mentioned as a natural source of ubiquinone (the oxidized form of CoQ10). However, the evidence specifically supporting its use as a meaningful CoQ10 source is limited. It should not be relied on as a primary source.

Supplement considerations

• Form: Ubiquinol is the reduced, active form of CoQ10. Ubiquinone is the oxidized form — your body converts it into ubiquinol before use. Some evidence suggests ubiquinol may be absorbed more easily, especially in older adults or people under higher oxidative stress (a state where harmful molecules outnumber the body’s defenses). However, direct head-to-head clinical outcome data comparing the two forms remain limited.
• Dosage: The randomized controlled trial that found blood vessel benefits used 300 mg per day [PMID: 21388622]. A review notes that clinical trials in heart failure and statin-related muscle symptoms have generally used 100–300 mg per day [PMID: 41521431]. The right dose for any individual should be decided with a healthcare provider.
• Timing: Taking CoQ10 with a fat-containing meal is generally recommended to support absorption, since CoQ10 is fat-soluble [PMID: 41521431]. The available clinical evidence has not established a specific time of day as best.

When NOT to do this

Frequently Asked Questions

Can I combine this with my daily fish oil supplement?

Taking CoQ10 alongside a fat-containing supplement like fish oil is a reasonable approach. CoQ10 is fat-soluble, so the fats in fish oil may help your body absorb it. Taking both with a meal is generally advisable. Ask your healthcare provider about your specific supplement routine.

What if I miss a dose — should I double up the next day?

Doubling up on a missed dose is generally not recommended for most supplements. If you miss a dose, simply resume your normal amount at the next scheduled time. Ask your healthcare provider or pharmacist for advice specific to your situation.

How does Ubiquinol compare to standard Ubiquinone?

Ubiquinone is the oxidized form of CoQ10. Your body must convert it into ubiquinol before it can be used in cellular processes. Some evidence suggests ubiquinol may be absorbed more easily — particularly in older adults or people under higher oxidative stress. However, strong head-to-head clinical outcome data comparing the two forms are still limited.

Why might it take several weeks of supplementation before effects are noticed?

Statins continuously affect the pathway your body uses to make CoQ10. That means ongoing supplementation may be needed to keep CoQ10 levels adequate. Clinical trials have generally run for 8 weeks or longer to measure outcomes [PMID: 21388622]. Individual responses will vary, and any changes you notice should be discussed with a healthcare provider.

Is the supplement form necessary if I eat beef heart weekly?

Food sources of CoQ10 provide meaningful amounts, but the doses used in clinical trials — generally 100–300 mg per day — are much higher than what food alone typically provides [PMID: 41521431]. Whether supplementation is right for you depends on your health situation and should be discussed with a healthcare provider.

Verified Sources

• Coenzyme Q10 in Cardiovascular Medicine: Mechanisms, Clinical Evidence, and Future Integration in Heart Failure and Statin Myopathy. — Cardiology in review, 2026 (PMID 41521431)
• Reversal of mitochondrial dysfunction by coenzyme Q10 supplement improves endothelial function in patients with ischaemic left ventricular systolic dysfunction: a randomized controlled trial. — Atherosclerosis, 2011 (PMID 21388622)