Tourist guides for Marrakech warn you, not to get a henna tattoo at the "Square", because there is no control about professionalism and toxic ingredients like PPD. But if you think, you are better off, if you go to the Ensemble Artisanal, you are wrong. The young woman, who is doing henna tattoos there, uses PPD without any warnings. My daughter got a terrible infection and a dramatic allergic reaction after getting a tattoo there. She will suffer for the rest of her life from it. Therefore, don't go for a henna tattoo at the ensemble artisanal - there are other shops, however, which offer quite good products. I don't want to condemn the whole institutions.