Dr. Henrique Marcelo Gualberto Pereira is Director of the Brazilian Doping Control Laboratory and Professor in the Department of Analytical Chemistry at the Federal University of Rio de Janeiro. Henrique is also President of the World Association of Anti-Doping Scientists (WAADS). In our conversation, we talk about his background, the Brazilian Doping Control Laboratory, and the role of WAADS in the anti-doping community. He also shares some of the important research that he and his colleagues are working on, including using a zebrafish water tank model to better understand the metabolism of prohibited substances and research aimed at better detecting use of cobalt, a prohibited substance that can impact red blood cell production.