... in small amounts in a wide variety of foods and is synthesized in all tissues. CoQ10 plays an important ... the mitochondria. In its reduced form, ubiquinol, CoQ also serves as an antioxidant. Ubiquinol inhibits lipid peroxidation in biological membranes and ... disease, in addition to stimulation of the immune system and slowing the ageing process, is sold in the US as a dietary supplement.Certificate ...