When an athlete tests positive for a banned substance and claims it was the result of a contaninated supplement, eyes generally roll. But while it can simply be an effort to deflect blame and responsibility, contaminated supplements are a real issue and a genuine problem. In this episode, Oliver Catlin - president and co-founder with his late father Don of the Banned Substances Control Group (BSCG) - explains how supplements can be contaminated, what athletes can do to protect themselves against testing positive because of supplements they have consumed,and how BSCG's Certified Drug Free labeling helps to steer athletes and others toward trusted products.

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