What is it?
Coenzyme Q10 is a fat-soluble, vitamin-like substance contained in every human cell. It's involved in key biochemical reactions that produce energy in cells. It also acts as an antioxidant. It is naturally present in offal such as heart, liver and kidneys, as well as in beef, soya bean oil, sardines, mackerel and peanuts.
Who uses it?
In most people aged over 30, levels of coenzyme Q10 in the skin are below their optimum, resulting in a reduced ability to produce collagen and elastin. Skin depleted of coenzyme Q10 may be more prone to damage by free radicals (air pollution, sun, tobacco smoke). Adding coenzyme Q10 may boost skin repair and regeneration and reduce free radical damage. It is also a small molecule that can relatively easily penetrate into skin cells.
Who makes it?
Some companies have introduced skincare products with coenzyme Q10. But so far very few genuine studies have indicated that it has practical skin benefits. A 1999 German study reported that its long-term use reduced wrinkles around the eyes.