On 19 September 2013, the FIFA Medical Department lead by Jiri Dvorak, FIFA Chief Medical Officer, sent a warning to all football players, alerting them to the contamination of fat burners and mental enhancers.
According to recent investigations by the Center for Preventive Doping Research at the German Sport University Cologne and a WADA-accredited laboratory in Montreal, nutritional supplements can be contaminated with the banned substance oxilofrine, which is prohibited in competition. Synonyms for oxilofrine are methylsynephrine, hydroxyephrine and oxyephrine.
Various products advertising extreme fat loss (“fat burners”) and/or an increase in mental performance (“neuroenhancers”) were found to contain oxilofrine, even though it was not listed among the products’ ingredients. If football players consume such supplements, they risk not only seriously damaging their health but also returning a positive doping test. FIFA’s Chief Medical Officer Prof. Jiri Dvorak therefore advises emphatically against the consumption of such supplements.