Coenzyme Q10 (CoQ10), also known as ubiquinone and ubidecarenone, is often described as a vitamin or at least a vitamin-like substance. However, it is not strictly a vitamin, as it can be synthesised in the liver. CoQ10 is synthesised from the amino acid tyrosine (this synthesis in turn requires other vitamins and minerals) but is also absorbed from a wide variety of foods.
This is a companion discussion topic for the original article at https://patient.info/doctor/coenzyme-q10