[Klugschnacker]

Im oben verlinkten Slowtwitch-Artikel ist von einem Gütesiegel die Rede. Es wird jedoch davor gewarnt, Versprechungen der Hersteller zu vertrauen, auch in Europa:

Some of the brands included in the survey made claims about products being “tested by an independent laboratory” or that they were “doping free.” Some of these products were actually found to contain banned substances.

Grüße,
Arne