What is Coenzyme Q10? Your body needs energy to function. Coenzyme Q10 (CoQ10) is involved in the manufacture of cellular energy, called ATP. Just as the car cannot function without that initial spark, the human body cannot function without CoQ10. Energy is produced in your body by small structures inside our cells called mitochondria. Most cells in your body contain between 500 – 2000 mitochondria. Heart cells have 5000! If your mitochondria are healthy, you will be too. Every cell in your body needs CoQ10, but no U.S. Dietary Reference Intake has been established for this important substance because the body can manufacture CoQ10 from scratch. The typical recommended dosage of CoQ10 is 30 to 300 mg daily.