 Some others include psychoactive plants like Ayahuasca Epena and Jurema used in rituals currently being investigated for their potential use in psychiatry.The Free Radicals and Oxidative Stress Group at the UPV/EHU's Faculty of Medicine and Nursing at the University of the Basque Country has published a study where traditionally infused Vismia baccifera has shown massive induction of oxidative stress in kidney cancer cells, with rapid death, but leaving healthy cells alone.Ver-o-peso is a market in Belém which sells native foods (and remedies), and is more recently a host to the Açaí Fair.