M&S does not support the use of 6-OXO!
There are no peer-reviewed studies that evaluate the safety or efficacy of 4-Androstene-3,6,17-trione (6-OXO) in humans.
The FDA issued a warning letter against it on 7 July, 2006, and stated that the marketing of the product violates the Federal Food, Drug, and Cosmetic Act.
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