Supplements. They can be bought almost anywhere. Do you allow your athlete to take them? Do you even know if he/she takes supplements? Do you know what is in them? Are the ingredients safe?
A recent article does a deep dive into this issue.
"InvestigateTV analyzed the FDA’s database of nearly 1,000 tainted products illegally marketed as dietary supplements since 2007. The results showed 98% of the tainted products were in the performance-enhancement categories. Sexual enhancement products were the most frequently reported, followed by weight loss and muscle building products."
Read more here....