The USP refers to Coenzyme Q10 as Ubidecarenone, which is a fat-soluble, vitamin-like substance. It is present in every cell of the body and acts as a vital intermediate of the electron transport system in the mitochondrial membrane for cellular respiration and ATP production. The highest requirement of Ubidecarenone is found in the cells and tissues that are metabolically active, such as the heart, immune system, skeletal muscle, and gingiva, and these are most susceptible to Ubidecarenone deficiency. The production of Ubidecarenone slows down with advancing age and thus contributes to the manifestation of aging.
As Ubidecarenone is a lipophilic substance, it is absorbed less on an empty stomach and absorbed in greater amounts when taken with food of high lipid content. Thus, after oral administration, Ubidecarenone is absorbed from the small intestine into the lymphatic system and then taken up by the liver, where it is incorporated into lipoproteins and released into the blood circulation, and at that time concentrated in the tissues.
Ubidecarenone is distributed to the various tissues of the body and is able to enter the brain. The concentration varies from tissue to tissue, and those with high rates of metabolic activity and high energy demands, such as the heart, muscle, liver, kidney, and brain, contain relatively high concentrations of Ubidecarenone. Ubidecarenone is metabolized in all tissues of the body. Approximately 60% of an oral dose of Ubidecarenone is excreted in the feces. The main elimination of Ubidecarenone occurs with bile.