In this lesson, the health experts of the world renown Voluntary Anti-Doping Association (VADA) and former heavyweight champion Wladimir Klitschko review the ins and outs of supplements and how they can be both helpful, as well as adversely negative for boxers and the boxer’s career. This is the first segment of an on-going series. Subscribe to the VADA Testing YouTube Channel and follow VADA on Twitter @vada-testing.org