TBARS are substances produced as a by-production of the degradation of lipids in the process of lipid peroxidation. As such, TBARS are a useful bio-marker of the extent of oxidative stress and damage. Clinical research has shown that Coenzyme Q10 supplementation is associated with reduced levels of TBARS, indicating an effective antioxidant effect of the Coenzyme Q10 supplements.Ubiquinol: Ubiquinol, the reduced form of Coenzyme Q10, expressed as QH2, is an important antioxidant in cell membranes and lipoproteins. It has not been tested much in clinical trials. There is research evidence that ubiquinol, taken in supplement form, will be converted to the ubiquinone form in the stomach and small intestine before it reaches the absorption cells.