Twenty Official Medicines Control Laboratories (OMCL) from 17 different European countries participated in the second Market Surveillance on Suspected Illegal Products (MSSIP002). Participants were asked to analyse Dietary Supplements advertised as Sexual Potency Enhancers obtained from both the legal and the illegal supply chain, using methods of their choice, and to report the presence of any undeclared active pharmaceutical ingredient (API) found in the samples, estimating their amount whenever possible.