Coenzyme Q10

Coenzyme Q10 (ubiquinone) — is an important fat-soluble compound involved in energy production in the mitochondria of cells.

It is essential for the synthesis of ATP — the main source of cellular energy. Coenzyme Q10 also has pronounced antioxidant properties, protecting cells from damage by free radicals.

With age and certain diseases, its level in the body decreases, which can lead to reduced vitality and impaired function of the heart and brain.

Beneficial properties

• participates in energy production (ATP) in the mitochondria;
• provides antioxidant protection for cells;
• supports the cardiovascular system;
• may improve cognitive functions and concentration;
• helps strengthen immune defense.

Daily requirement and sources of intake

The body can synthesize coenzyme Q10 on its own, but this ability decreases with age.

The recommended daily dose is:

• for general health maintenance — 30–100 mg;
• in case of cardiovascular diseases — 100–300 mg (as prescribed by a doctor);
• maximum allowable over-the-counter dose — up to 300 mg per day.

The main sources of coenzyme Q10 are:

• beef, pork, chicken (especially internal organs);
• fish: sardines, tuna, salmon;
• nuts and seeds: hazelnuts, peanuts, seeds;
• vegetables: spinach, broccoli, cauliflower;
• olive and canola oils.

Coenzyme Q10 is also widely available in the form of supplements (capsules, liquid, tablets), which are especially useful in cases of deficiency.

Possible forms and their absorption

Nutrient forms are listed from best to worst:

Ubiquinol. The restored and most bioavailable form of CoQ10 actively works in mitochondria and cells with high energy turnover. It is better suited for fatigue, heart diseases, aging, and deficiency—especially after the age of 40.

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iHerb

Carlson, Co-QH2 Ubiquinol, 100 mg, 60 Soft Gels

≈ $38.07

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iHerb

Terry Naturally, CoQ10, Bioactive Ubiquinol, 100 mg, 60 Softgels

≈ $39.77

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iHerb

Life Extension, Super Ubiquinol CoQ10 with Enhanced Mitochondrial Support, 50 mg, 100 Softgels

≈ $47.35

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iHerb

Nutricost, Ubiquinol, 100 mg, 120 Softgels

≈ $69.03

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iHerb

Natural Factors, Ubiquinol, Active CoQ10, 100 mg, 120 Softgels

≈ $51.10

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iHerb

Protocol for Life Balance, Ubiquinol, 100 mg, 60 Softgels

≈ $49.93

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iHerb

Qunol, Plus Ubiquinol + Omega-3, 100 mg + 250 mg, 90 Softgels

≈ $42.18

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iHerb

Swanson, Ubiquinol, 100 mg, 60 Softgels

≈ $34.32

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iHerb

Swanson, Ubiquinol, 50 mg, 60 Softgels

≈ $16.41

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iHerb

Swanson, Ubiquinol, 100 mg, 120 Softgels

≈ $63.87

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Liposomal CoQ10 or CoQ10 with MCT/piperine. Enhanced forms of ubiquinone with increased bioavailability due to lipid carriers. Effective when there is no access to ubiquinol, but inferior to it in stability and speed of action.

Ubiquinone. The oxidized form of CoQ10 requires conversion to ubiquinol in the body. It is suitable for young people with good metabolism, but in the elderly and those with chronic illnesses, absorption may be limited.

Show 3 product

iHerb

Life Extension, Super-Absorbable CoQ10 (Ubiquinone) with d-Limonene, 100 mg, 60 Softgels

≈ $25.17

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iHerb

Lake Avenue Nutrition, CoQ10, USP Grade Ubiquinone, 100 mg, 120 Veggie Capsules

≈ $15.05

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iHerb

Lake Avenue Nutrition, CoQ10, USP Grade Ubiquinone, 100 mg, 360 Veggie Capsules

≈ $41.32

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Symptoms and consequences of deficiency

• chronic fatigue, weakness, and decreased endurance;
• worsening heart function and increased risk of cardiovascular diseases;
• decreased immunity and frequent colds;
• memory and concentration problems;
• gum inflammation and periodontitis.

The risk of deficiency increases with the use of statins, chronic diseases, and nutritional deficiencies. Symptoms may develop slowly, so it is important to regularly monitor the body’s condition.

Possible risks of excess and their manifestations

• digestive disorders (nausea, abdominal pain, diarrhea);
• headaches and insomnia;
• in rare cases — allergic reactions (rash, itching, swelling);
• increased sensitivity to other medications.

Excess coenzyme Q10 is more likely to occur with high doses of supplements (more than 300 mg per day).

To avoid side effects, it is recommended to stick to moderate doses and consult a doctor before starting supplementation, especially in the presence of chronic diseases.