HFL’s Informed-Sport list only includes dietary supplements that are tested to be free of the 1000s of contaminants banned by agencies such as the World Anti-Doping Agency.

The products were USANA's Mega Antioxidant, Chelated Mineral, Active Calcium, Procosa II, Poly C and Body Rox.

"We are proud to have our high-quality products listed by a trusted third-party organization like HFL Sport Science," said USANA executive vice president of research and development, Dr Tim Wood.