The U.S. Food and Drug Administration (FDA) have investigated products labelled OxyElite Pro because of potential links to acute hepatitis, a type of liver disease. The FDA (and UK citizens would be wise to follow this advice too) recommend not to use any supplements labelled OxyElite Pro or VERSA-1 because it contains a substance called Aegeline, for which there is insufficient evidence supporting its safety for human consumption. Aegeline’s chemical name is N-[2-hydroxy-2(4-methoxyphenyl) ethyl]-3-phenyl-2-propenamide, so keep an eye out for this too!
U.S. Food and Drug Administration. (2013). FDA Investigates Acute Hepatitis Illnesses Potentially Linked to Products Labeled OxyElite Pro. Retrieved 29th October, 2013, from, http://www.fda.gov/food/recallsoutbreaksemergencies/outbreaks/ucm370849.htm