Psilocybin is touted for its trippy, recreational effects as much as it is for its purported mind-opening health benefits. Two of the edible products contained psilocin, the substance that psilocybin is broken down into once it’s ingested by your body. “Over the years, we’ve tested many botanical dietary supplements,” van Breemen told SciAm. Last year, the Centers for Disease Control and Prevention began investigating reports of severe illness after consuming a popular brand of psilocybin edibles, SciAm noted. “The mislabeling highlighted in this [study] causes harms,” Lori Bruce, a Yale University bioethicist who studies psychedelics, told the magazine.