Netherlands (25.8%), in Austria (22.7%), in the UK (18.8%) and the USA (18.8%). According to the label, all positive supplements were from companies located in only five countries: the USA, the Netherlands, [...] $%%# * ) + % ,,- ./ (0 1 The limit of detection of the method was evaluated in different matrices for all substances mentioned above, and was estimated at about 0.005 -0.1 pg/g. Only concentrations above 0 [...] label. We could not obtain reli- able data for 66 samples (10.4%) because of matrix effects. Out of all positive supplements 23 samples (24.5%) contained prohor- mones of nandrolone and testosterone, 64