Krislow capsule contains Coenzyme Q10. Coenzyme Q 10, which is also known as ubiquinone, is a vitamin-like substance that is present in most cells. It is an antioxidant (meaning it inhibits the oxidation of other molecules). Sometimes, oxidation reactions produce free radicals which can start chain reactions in cells resulting in damage or cell death. So antioxidants can be good when they terminate the chain reactions before there is damage to the cell. CoQ10 is a powerful antioxidant and some trials have shown it can improve sperm quality in subfertile men.There was a significant positive correlation between CoQ10 concentration and normal morphology of spermatozoa, and CoQ10 was also modestly but significantly correlated with the forward motility of sperm. Use under medical supervision.