If you have high blood pressure, you may have come across CoQ10 as a supplement that could help lower your numbers naturally.
Some studies suggest it might help, particularly with systolic blood pressure, the top number in your reading. Other studies have found little or no benefit.
That can make it difficult to know whether CoQ10 is worth considering, especially when supplement advertisements sometimes make the benefits sound more certain than the research supports.
The good news is that researchers have studied CoQ10 in numerous clinical trials, including several recent reviews that help put its potential benefits into perspective.
Here’s what the evidence tells us about CoQ10 for blood pressure, how much has been studied, how long it might take to work, and what you should know before taking it.
Quick Answer: Does CoQ10 Lower Blood Pressure?
CoQ10 may modestly lower systolic blood pressure in some people, but the evidence is mixed, and it has not been established as a reliable treatment for hypertension.
A 2025 systematic review and meta-analysis of 45 randomized controlled trials found that CoQ10 supplementation reduced systolic blood pressure by an average of approximately 3.4 mmHg compared with control groups.
However, the researchers did not find a statistically significant reduction in diastolic blood pressure, the bottom number in a blood pressure reading.
Earlier research has also produced conflicting findings, including studies that found no meaningful benefit.
This means CoQ10 may have a supporting role for certain individuals, but it should not replace blood pressure medication or proven lifestyle changes.
If you’re considering CoQ10, it’s worth understanding both the potential benefits and the limitations of the research before deciding whether to discuss it with your healthcare provider.
What Is CoQ10?
Coenzyme Q10, usually shortened to CoQ10, is a naturally occurring substance found in nearly every cell in your body.
Its primary job is helping your cells produce energy.
This is especially important for organs that require large amounts of energy, including your heart, kidneys, liver, and brain.
CoQ10 also acts as an antioxidant, helping protect cells from certain types of damage caused by unstable molecules known as free radicals.
Your body produces CoQ10 naturally, but the amount present in tissues can change with age, health conditions, and certain medications.
CoQ10 is also found in small amounts in foods such as:
- Fatty fish, including salmon and sardines
- Beef and chicken
- Organ meats
- Nuts and seeds
- Soybeans
- Certain vegetable oils
However, the amounts obtained through an ordinary diet are generally much smaller than the amounts used in CoQ10 clinical trials.
CoQ10 supplements are sold in capsules, softgels, and other forms, often marketed for heart health, energy production, or antioxidant support.
But the fact that CoQ10 plays an important role in normal cellular function does not automatically mean that taking extra CoQ10 will lower your blood pressure.
That question requires evidence from clinical studies.
Does CoQ10 Lower Blood Pressure?
Research suggests that CoQ10 may produce a small reduction in systolic blood pressure, although the results have not been consistent across studies.
To understand what that means, it helps to look at the two numbers in a blood pressure reading.
Systolic blood pressure is the top number. It measures pressure in your arteries when your heart contracts and pumps blood.
Diastolic blood pressure is the bottom number. It measures pressure in your arteries while your heart relaxes between beats.
Both numbers matter, but researchers studying CoQ10 have generally found more promising results for systolic pressure.
For example, someone with a blood pressure reading of 140/90 mmHg might wonder whether taking CoQ10 could help bring that reading closer to a healthier range.
A study reporting an average systolic reduction of 3 or 4 mmHg does not mean that everyone taking CoQ10 will experience that improvement.
Some people may see a larger change, others may see little difference, and some may see no measurable benefit.
Blood pressure also fluctuates naturally throughout the day, making it difficult to determine whether a small change is caused by a supplement or by other factors.
This is why the overall body of research matters more than any single study.
What Does the Scientific Research Say About CoQ10?
Several systematic reviews and meta-analyses have examined CoQ10 and blood pressure.
A meta-analysis combines results from multiple studies to help researchers identify patterns that may not be obvious from individual trials.
The findings are interesting, but they also illustrate why CoQ10 remains a subject of debate.
The 2025 Meta-Analysis: A Modest Systolic Benefit
A 2025 systematic review and meta-analysis examined 45 randomized controlled trials involving CoQ10 supplementation.
The researchers found that CoQ10 was associated with an average reduction of approximately:
- 3.4 mmHg in systolic blood pressure
- 1.1 mmHg in diastolic blood pressure, a change that was not statistically significant
The researchers also found that studies lasting longer than eight weeks tended to report greater systolic blood pressure reductions than shorter studies.
These findings suggest that CoQ10 may have a modest effect on systolic blood pressure, particularly when taken over a longer period.
However, the studies varied substantially in their participants, doses, treatment durations, and results.
Some trials also had methodological limitations that could affect the reliability of their findings.
Consequently, the average reduction should not be interpreted as a predictable benefit for everyone taking CoQ10.
A 2022 Review Also Found Possible Benefits
A 2022 systematic review and meta-analysis examined 26 randomized controlled trials involving 1,831 participants with cardiometabolic conditions.
These included conditions such as diabetes and abnormal cholesterol levels.
The researchers reported an average systolic blood pressure reduction of approximately 4.8 mmHg.
They also found that doses around 100 to 200 mg per day were associated with greater systolic reductions in their analysis.
However, the evidence for diastolic blood pressure was weaker, and the results did not establish that these doses would be effective for everyone with hypertension.
The study population is another important consideration.
Results from people with diabetes or other metabolic conditions may not apply equally to otherwise healthy adults with elevated blood pressure.
Why Earlier Research Reached Different Conclusions
Not every scientific review has found that CoQ10 lowers blood pressure.
A Cochrane review updated in 2016 examined randomized trials involving people with primary hypertension.
After excluding a study with a high risk of bias, the researchers analyzed data from two small trials involving 50 participants.
They found no meaningful blood pressure reduction compared with placebo.
The National Center for Complementary and Integrative Health (NCCIH), part of the National Institutes of Health, has also described the evidence for CoQ10’s blood pressure benefits as unconvincing.
These conclusions are more cautious than those of some recent meta-analyses.
The differences partly reflect which studies were included, the populations examined, and how researchers evaluated study quality.
What Should You Take Away From These Studies?
The research supports a cautious conclusion.
CoQ10 may lower systolic blood pressure by a few points in some people, but the effect is not consistently demonstrated across all studies.
There is also insufficient evidence that CoQ10 supplementation prevents heart attacks, strokes, or other complications of hypertension.
For now, CoQ10 is best viewed as a possible supplement to discuss with your healthcare provider, not an established blood pressure treatment.
For a broader comparison of CoQ10 with other commonly studied supplements, see Best Supplements for High Blood Pressure.
How Might CoQ10 Affect Blood Pressure?
Researchers have proposed several ways CoQ10 might influence blood pressure.
These possibilities are based on CoQ10’s biological functions, but they do not prove that supplementation produces meaningful blood pressure improvements.
Supporting Blood Vessel Function
Healthy blood vessels need to relax and widen as blood flows through them.
When blood vessels become less flexible or remain more constricted, resistance to blood flow can increase.
CoQ10 may influence processes involved in blood vessel relaxation, including the function of the endothelium, the thin layer of cells lining blood vessels.
Some research suggests that CoQ10 could support endothelial function, although the extent to which this translates into lower blood pressure remains uncertain.
Reducing Oxidative Stress
Oxidative stress occurs when the body’s production of potentially damaging molecules exceeds its ability to control them.
Excessive oxidative stress may contribute to blood vessel dysfunction and cardiovascular disease.
Because CoQ10 acts as an antioxidant, researchers have investigated whether supplementation might help reduce oxidative stress and improve vascular health.
However, reducing a biological marker of oxidative stress does not necessarily mean that a supplement will lower blood pressure or prevent cardiovascular complications.
Supporting Cellular Energy Production
CoQ10 plays an important role in mitochondria, the structures within cells responsible for producing much of the energy the body uses.
Heart muscle cells depend heavily on this energy production.
Researchers have investigated whether supporting mitochondrial function could benefit cardiovascular health.
Still, CoQ10’s essential role in energy production should not be confused with proof that taking CoQ10 supplements improves blood pressure control.
How Much CoQ10 Has Been Studied for Blood Pressure?
Clinical trials have used different amounts of CoQ10, making it difficult to identify one ideal dose.
Many studies have examined daily amounts ranging from approximately 100 to 300 mg, although some have used amounts outside that range.
The 2022 meta-analysis found that doses around 100 to 200 mg per day were associated with greater systolic blood pressure reductions in the populations studied.
The 2025 review also reported more favorable systolic results in some lower-dose subgroups.
However, these findings do not establish an optimal dose for treating hypertension.
There are several reasons for caution.
First, people enrolled in clinical trials may have different health conditions, starting blood pressures, and medication regimens.
Second, different CoQ10 formulations may not be absorbed in the same way.
Third, a dose that appears effective in a group of research participants may not produce the same result in an individual.
There is currently no universally established CoQ10 dosage for treating high blood pressure.
If you’re considering supplementation, discuss the appropriate product and amount with your healthcare provider or pharmacist rather than choosing a dose solely because it appeared in a clinical trial.
Taking more CoQ10 does not necessarily mean you will get better results.
How Long Does CoQ10 Take to Lower Blood Pressure?
CoQ10 is not a fast-acting blood pressure treatment.
Clinical studies generally evaluate its effects over weeks or months rather than hours or days.
In the 2025 meta-analysis, trials lasting longer than eight weeks tended to show greater systolic blood pressure reductions than shorter trials.
A separate 2022 analysis also found more favorable results in some studies lasting longer than 12 weeks.
These findings suggest that any potential effect may take time to become measurable.
However, they do not establish that CoQ10 will begin working after a particular number of weeks.
Some people may not experience any meaningful reduction, even after taking it for an extended period.
It’s also important to remember that blood pressure changes naturally.
Stress, physical activity, sleep, caffeine, hydration, and the time of day can all influence a reading.
A lower reading after starting CoQ10 does not automatically mean the supplement caused the improvement.
If your healthcare provider agrees that trying CoQ10 is appropriate, keeping a consistent record of your blood pressure readings can help you evaluate changes over time.
Ubiquinol vs. Ubiquinone: Does the Form of CoQ10 Matter?
When shopping for CoQ10, you’ll probably encounter two common forms: ubiquinone and ubiquinol.
Both are forms of coenzyme Q10, but they differ in their chemical state.
Ubiquinone
Ubiquinone is the oxidized form of CoQ10.
It has been used in many clinical studies and is commonly found in dietary supplements.
The body can convert ubiquinone into ubiquinol as needed.
Ubiquinol
Ubiquinol is the reduced form of CoQ10.
It is often marketed as being easier for the body to absorb.
Some studies have found differences in absorption between particular ubiquinol and ubiquinone products.
However, absorption also depends on the formulation, the ingredients used, and how the supplement is taken.
Higher absorption does not necessarily mean greater blood pressure reduction.
Which Form Is Better for Blood Pressure?
There is not enough reliable evidence to conclude that ubiquinol is more effective than ubiquinone for lowering blood pressure.
Both forms have been investigated, but direct comparisons of their effects on hypertension remain limited.
For that reason, choosing the more expensive formulation does not guarantee better results.
If you and your healthcare provider decide to consider CoQ10, product quality, dose, potential interactions, and your individual health circumstances are more important than marketing claims about one form being superior.
Are There Side Effects of CoQ10?
CoQ10 is generally well tolerated in clinical studies, but that does not mean it is completely free of side effects.
Reported side effects include:
- Nausea or stomach discomfort
- Diarrhea
- Reduced appetite
- Headache
- Dizziness
- Mild skin reactions
- Difficulty sleeping
Most reported side effects have been mild.
Some people find that taking CoQ10 with food helps reduce digestive discomfort, although this does not eliminate the possibility of side effects.
Long-term safety information is more limited than the safety data available for established blood pressure medications.
It’s also important to distinguish between CoQ10 itself and commercial products containing additional ingredients.
A supplement marketed for cardiovascular health may contain herbs, minerals, stimulants, or other compounds that introduce additional risks.
Always check the complete ingredient list.
Can You Take CoQ10 With Blood Pressure Medication?
CoQ10 may be used alongside prescription medications in some circumstances, but you should discuss it with your healthcare provider before combining them.
Because CoQ10 may modestly lower blood pressure in some people, there is a possibility that it could contribute to an excessive blood pressure reduction when combined with medication.
This concern is especially relevant if your blood pressure is already well controlled or you take multiple medications.
Symptoms of blood pressure becoming too low may include dizziness, lightheadedness, weakness, or fainting.
However, not every person taking CoQ10 with blood pressure medication will experience these effects.
CoQ10 and Warfarin
One particularly important interaction involves warfarin, a prescription anticoagulant used to reduce the risk of harmful blood clots.
CoQ10 may reduce warfarin’s anticoagulant effect in some people.
This could interfere with the medication’s ability to prevent blood clots.
If you take warfarin, do not start or stop CoQ10 without discussing it with the clinician managing your anticoagulation treatment.
CoQ10 and Diabetes Medications
CoQ10 may also interact with insulin or affect blood sugar management in some circumstances.
People taking diabetes medications should discuss supplementation with their healthcare provider, particularly if their treatment requires close blood sugar monitoring.
Other Medication Considerations
CoQ10 may not be appropriate during certain cancer treatments.
People taking multiple prescription medications should also have their medication and supplement lists reviewed for possible interactions.
A pharmacist can often help identify concerns before you begin taking a new supplement.
Who Should Be Especially Cautious About Taking CoQ10?
Although CoQ10 is often promoted as a natural supplement, certain people should be particularly careful.
These include individuals who:
- Take warfarin or other medications requiring careful monitoring
- Take multiple blood pressure medications
- Experience episodes of low blood pressure
- Use insulin or other diabetes medications
- Are receiving cancer treatment
- Are pregnant or breastfeeding, because safety information is limited
- Have complex medical conditions or take several supplements
If any of these situations apply to you, speak with your healthcare provider before using CoQ10.
And remember, supplements should never be used as a substitute for medical evaluation when blood pressure is severely elevated.
If you’re uncertain about when a reading requires prompt attention, When Is Blood Pressure Dangerous? explains the warning signs and blood pressure levels that deserve medical attention.
CoQ10 vs. Magnesium for Blood Pressure
CoQ10 and magnesium are both commonly discussed as possible supplements for blood pressure management.
However, they work differently in the body and have different levels of supporting evidence.
Magnesium is an essential mineral involved in muscle function, nerve signaling, and blood pressure regulation.
CoQ10 is a naturally occurring compound involved in cellular energy production and antioxidant activity.
Research suggests that magnesium supplementation may modestly lower both systolic and diastolic blood pressure, particularly in certain populations.
CoQ10 research has generally found more consistent evidence for a possible reduction in systolic pressure than in diastolic pressure.
Neither supplement should be considered a replacement for prescribed hypertension treatment.
The two also have different safety considerations.
Magnesium supplements can cause digestive problems and may be especially risky for people with impaired kidney function.
CoQ10 has its own potential side effects and medication interactions, particularly with warfarin.
There is no good reason to assume that combining the two supplements will produce greater blood pressure reductions.
For a closer look at magnesium’s benefits, limitations, and safety considerations, see Magnesium for Blood Pressure.
How Can You Tell Whether CoQ10 Is Helping Your Blood Pressure?
If you decide to try CoQ10 with your healthcare provider’s approval, the most useful way to evaluate its effect is through consistent blood pressure monitoring.
Don’t rely on how you feel.
High blood pressure often produces no noticeable symptoms, and a small change in your numbers may not cause any physical sensation.
A practical approach includes:
- Establish a baseline. Record your blood pressure regularly before starting the supplement, following your healthcare provider’s instructions.
- Measure under similar conditions. Use a validated upper-arm monitor, sit quietly for at least five minutes, and avoid caffeine, smoking, and exercise for 30 minutes before measuring.
- Keep a written record. Note your readings, medication use, and any symptoms.
- Look at averages rather than individual readings. One unusually low measurement does not prove that CoQ10 is working.
- Review the results with your healthcare provider. Discuss whether there has been a meaningful change and whether continuing the supplement makes sense.
Even with careful monitoring, it may be difficult to determine whether CoQ10 caused a small improvement.
Changes in diet, exercise, weight, stress, sleep, or medication can all influence blood pressure during the same period.
For a better understanding of what your measurements mean, see Blood Pressure Numbers Explained.
Is CoQ10 Worth Taking for High Blood Pressure?
The answer depends on your health, medications, expectations, and reasons for considering it.
CoQ10 has some encouraging research behind it, particularly for modest reductions in systolic blood pressure.
But there are several reasons not to overstate its benefits.
The clinical evidence is inconsistent, study quality varies, and there is no established dose that reliably lowers blood pressure in everyone.
There is also no convincing evidence that taking CoQ10 specifically to lower blood pressure prevents heart attacks or strokes.
For someone whose blood pressure is only mildly elevated, discussing CoQ10 with a healthcare provider may be reasonable.
However, even in that situation, it makes sense to focus first on strategies with stronger supporting evidence.
These include:
- Following a heart-healthy eating pattern, such as the DASH diet
- Reducing excess sodium
- Getting regular physical activity
- Maintaining a healthy weight
- Limiting alcohol
- Getting adequate sleep
- Managing stress
- Taking prescribed blood pressure medication when needed
These approaches have much stronger evidence for managing hypertension than CoQ10 supplementation.
If you’re looking for practical steps that can make a meaningful difference, How to Lower Blood Pressure provides a broader overview of proven strategies.
CoQ10 may eventually prove useful for certain groups of people, but current evidence does not justify treating it as an essential part of blood pressure management.
Final Thoughts
CoQ10 is an interesting supplement because it plays an important role in cellular energy production and has been investigated for several aspects of cardiovascular health.
Research suggests that it may modestly reduce systolic blood pressure in some people.
A 2025 meta-analysis reported an average reduction of approximately 3.4 mmHg, while earlier reviews have produced less encouraging findings.
That makes the evidence promising in some respects, but far from conclusive.
CoQ10 is generally well tolerated, although side effects and medication interactions are possible.
If you’re considering taking it for blood pressure, the most sensible approach is to discuss it with your healthcare provider, especially if you already take prescription medication.
And keep the potential benefits in perspective.
A supplement that might lower systolic blood pressure by a few points is not a substitute for the lifestyle changes and medical treatments known to reduce the risks associated with hypertension.
CoQ10 may have a place as an additional measure for some people, but it should not be the foundation of your blood pressure management plan.
Frequently Asked Questions
Does CoQ10 lower systolic or diastolic blood pressure?
Research suggests CoQ10 may modestly lower systolic blood pressure, the top number in a blood pressure reading.
A 2025 meta-analysis found an average systolic reduction of approximately 3.4 mmHg but no statistically significant improvement in diastolic blood pressure.
However, study results have been inconsistent, and CoQ10 is not an established hypertension treatment.
How much CoQ10 should I take for high blood pressure?
There is no universally established CoQ10 dose for treating hypertension.
Clinical trials have commonly studied amounts around 100 to 300 mg daily, with some research suggesting greater systolic benefits at approximately 100 to 200 mg per day.
These findings are not a recommendation to take those amounts. Discuss the appropriate dose and potential interactions with your healthcare provider.
How long does CoQ10 take to work for blood pressure?
Clinical studies generally evaluate CoQ10 over several weeks or months.
Some research has found greater systolic blood pressure reductions in trials lasting longer than eight weeks.
However, there is no established timeline for when CoQ10 begins lowering blood pressure, and some people may experience no measurable benefit.
Can I take CoQ10 with lisinopril or other blood pressure medications?
CoQ10 may be used alongside certain blood pressure medications, but you should consult your healthcare provider or pharmacist first.
Because CoQ10 may lower blood pressure in some people, combining it with medication could potentially contribute to excessively low readings.
Never change or stop prescribed medication because you have started taking CoQ10.
Is ubiquinol better than regular CoQ10 for blood pressure?
There is insufficient evidence that ubiquinol lowers blood pressure more effectively than ubiquinone.
Some formulations of ubiquinol may be absorbed differently, but improved absorption does not necessarily mean better blood pressure results.
Both forms require more research to determine whether one offers a meaningful advantage for hypertension.
Can CoQ10 replace blood pressure medication?
No. CoQ10 has not demonstrated the reliable blood pressure-lowering effects or long-term cardiovascular benefits established for prescribed hypertension medications.
Stopping medication in favor of a supplement can leave blood pressure uncontrolled and increase the risk of serious complications.
Any medication changes should be made with the healthcare professional managing your treatment.
Is CoQ10 safe to take every day?
CoQ10 has generally been well tolerated in clinical studies, but daily use is not appropriate for everyone.
Possible side effects include digestive discomfort, headache, dizziness, and difficulty sleeping.
CoQ10 can also interact with certain medications, particularly warfarin, and long-term safety information is limited.
Talk with your healthcare provider before using it regularly.
References and Further Reading
- Effects of Coenzyme Q10 Administration on Blood Pressure and Heart Rate in Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. 2025. PubMed.
- Dose-Response Effect of Coenzyme Q10 Supplementation on Blood Pressure Among Patients With Cardiometabolic Disorders: A GRADE-Assessed Systematic Review and Meta-Analysis of Randomized Controlled Trials. 2022. Full study.
- Cochrane. Coenzyme Q10 for High Blood Pressure. Read the review.
- National Center for Complementary and Integrative Health. Coenzyme Q10. NCCIH information.
- National Center for Complementary and Integrative Health. Hypertension (High Blood Pressure). NCCIH information.
Medical disclaimer: This article is intended for educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before starting a supplement, particularly if you take prescription medications or have an existing medical condition.