PharmDr. Malikova: Coenzyme Q10 – fuel for cells

A key molecule for mitochondria, the heart and cell protection – why its levels decline with age and what this means for your health.

Coenzyme Q10: energy for cells, the heart and longevity

Did you know that without coenzyme Q10, your cells would be unable to produce the energy needed for life?
This substance is one of the most important molecules in the human body. It is found in virtually every cell and plays a key role in energy production in the mitochondria – the so-called ‘powerhouses of the cell’.

However, as we age, its production declines, which is precisely why coenzyme Q10 has become one of the most extensively studied dietary supplements in the fields of cardiovascular health, energy and ageing.

What is coenzyme Q10?

Coenzyme Q10 (CoQ10), also known as ubiquinone, is a fat-soluble substance produced naturally in the human body. It plays a vital role in the mitochondrial respiratory chain, where it helps to produce adenosine triphosphate (ATP) – the main energy molecule in cells.

In addition, it acts as a powerful antioxidant that protects cell membranes, DNA and lipids from oxidative damage.

The highest concentrations of CoQ10 are found in organs with high energy consumption:

• heart
• liver
• kidneys
• pancreas
• skeletal muscles

What is coenzyme Q10 used for?

Coenzyme Q10 is being studied in relation to a wide range of health issues. Some of its effects are fairly well documented, whilst others are still the subject of research.

1. Heart health

CoQ10 is often used as a supplement for heart failure or other cardiovascular conditions, as it supports energy production in the heart muscle.

2. Migraines

Some studies suggest that regular use may reduce the frequency and duration of migraines. However, the effects usually only become apparent after several months of use.

3. Side effects of statins

Statins (cholesterol-lowering drugs) can reduce CoQ10 levels in the body. Supplements are therefore sometimes used to alleviate muscle pain caused by statins.

4. Energy and physical performance

As CoQ10 plays a role in cellular energy production, it is thought to improve physical performance, although research findings are as yet inconclusive.

5. Antioxidant protection

As an antioxidant, it helps to neutralise free radicals and thus protect cells from oxidative stress, which is associated with ageing and many chronic diseases.

How much coenzyme Q10 is enough?

There is no single universal dose that is ideal for everyone. However, research does provide some guidelines.

Typical dosage:

The most commonly recommended dose for the average person is approximately 100–200 mg per day.

If the dose exceeds 100 mg, it is often recommended to split it into several smaller doses throughout the day to improve absorption and reduce the risk of digestive problems.

How little is too little, and how much is too much?

• Less than 30 mg a day – likely to have very little effect
• 100–200 mg per day – the most common and safe dose
• 300–400 mg per day – therapeutic doses for certain conditions
• over 1000 mg per day – used only in research or under medical supervision

Who can benefit most from CoQ10?

Coenzyme Q10 is most commonly recommended:

• people over the age of 40, when natural production declines
• patients with heart disease
• people taking statins
• people who suffer from migraines
• for athletes engaged in strenuous physical activity

It should be emphasised, however, that this is a dietary supplement, not a medicine, and its effects may vary from person to person.

Who should be careful?

Although CoQ10 is considered to be relatively safe, there are situations where caution is advised.

● People taking blood-thinning medication:
Coenzyme Q10 may reduce the effectiveness of warfarin, which could increase the risk of blood clots.

● People with diabetes:
This may affect blood sugar levels, so it is advisable to consult a doctor.

● Pregnant or breastfeeding women:
Safety during pregnancy and breastfeeding has not been sufficiently studied.

● People taking blood pressure medication
: CoQ10 may lower blood pressure, which could enhance the effect of antihypertensive drugs.

Possible side effects

Side effects are rare and usually mild:

● nausea
● diarrhoea
● stomach ache
● dizziness
● insomnia at higher doses

Conclusion

Coenzyme Q10 is a fascinating molecule that plays a vital role in cellular energy production and in protecting cells from oxidative stress. Although the body produces it naturally, its levels decline with age, which explains the growing interest in taking it as a supplement.

For most people, a daily dose of 100–200 mg is safe and sufficient, but a different dosage may be required for specific health conditions. However, it is important to remember that this is a dietary supplement and its use should be discussed with a doctor, particularly in cases of chronic illness or when taking medication.

Coenzyme Q10 thus remains an interesting example of how a small molecule can play a major role in our body’s energy system.

PharmDr. Kristína Malíková,
Technical Consultant at Carnomed

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