Coenzyme Q10
Ubiquinone
Coenzyme Q10, also known as ubiquinone, is a fat-soluble molecule naturally present in every cell membrane in our body. Coenzyme Q10 is essential for the efficient transfer of electrons within the mitochondrial oxidative respiratory chain and the production of adenosine triphosphate (ATP). This substance can potentially increase the production of vital antioxidants, such as superoxide dismutase, an enzyme that effectively alleviates vascular oxidative stress in people with hypertension. In addition, coenzyme Q10 reduces lipid peroxidation levels and may also improve blood flow and protect blood vessels.
Certain conditions such as fibromyalgia (tenderness and pain in connective tissue and muscles throughout the body), diabetes, cancer, heart failure (heart weakness), and neurodegenerative, mitochondrial, and muscle diseases are associated with reduced levels of coenzyme Q10 in the circulation. Statins (drugs that lower cholesterol and triglyceride levels) inhibit the production of the intermediate that leads to the synthesis of Q10. Studies have shown that statins may contribute to the depletion of coenzyme Q10. Since muscle pain and cramps are common side effects of statins, they attribute these symptoms to decreased Q10 levels, and coenzyme Q10 supplementation is recommended for all patients on statin therapy.
Most human studies of coenzyme Q10 have focused on oral supplementation. Available in a variety of forms, such as tablets, hard capsules, soft capsules, and liquid formulations, these oral supplements range from 30 to 600 mg per unit and are readily available over the counter. Meat has the highest amount of coenzyme Q10, followed by dairy products, eggs, and plant food sources (oils and legumes). Supplementation with 50 mg twice daily reduced mild to moderate myalgias (muscle pain) associated with statin use, which improved the ability to perform daily activities. Supplementation with 300 mg daily for 24 weeks in men with Peyronie’s disease can reduce penile plaque size, reduce penile curvature, and improve erectile function. CoQ10 supplementation reduces systemic inflammation and biochemical parameters in nonalcoholic fatty liver disease. However, coenzyme Q10 is excreted in the bile. Therefore, its use is not recommended in patients with biliary obstruction. According to a recent article on improving global outcomes in kidney disease, coenzyme Q10 supplementation may benefit patients with nephrotic syndrome due to primary Q10 deficiency. However, studies on the use of Q10 in patients with renal impairment are lacking; coenzyme Q10 supplementation should be avoided in patients with renal impairment. Coenzyme Q10 is not recommended during pregnancy and lactation.
Drug interactions:
Coenzyme Q10 is chemically similar to vitamin K, and there are some reports in the literature of a potential interaction between warfarin and Q10. There is a possibility of warfarin treatment failure when patients take Q10 supplements with warfarin therapy. Patients taking chemotherapy drugs should also avoid CoQ10, as there is insufficient data on its interaction with these drugs. Because coenzyme Q10 lowers fasting blood glucose in some patients, it should be used with caution in diabetics and patients prone to hypoglycemic episodes.