Coenzyme Q is a kind of liposoluble quinones with side chains composed of different number (6-10) isoprene units. Its benzoquinone structure can be reversibly hydrogenated to hydroquinone. It's the hydrogen transporter in the respiratory chain. Coq in mammalian cells contains 10 isoprene units, so it is also called Q10. Coq can accept reduction of one e and one H + to semi quinone, and then accept reduction of one e and one H + to dihydroubiquinone. There are also three different forms of CoQ: oxidation, semi quinone and reductive, which transfer one or two electrons in the respiratory chain.
Curcumin is orange yellow crystalline powder, slightly bitter and insoluble in water. It is mainly used for colouring intestinal products, cans, sauce and brine products in food production. Medical research shows that curcumin has the functions of lowering blood lipid, anti-tumor, anti-inflammatory, cholagogic and anti-oxidation.