News Health & Medicine Scientists may have found an antidote for death cap mushrooms Indocyanine green dye stopped a toxin from killing human cells and mice in lab tests Ingesting a death cap mushroom can result in kidney and liver damage, and even death. A dye used in some medical procedures seems to counteract the fungi’s most lethal toxin, lab tests show. syaber/iStock/Getty Images Plus Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Tina Hesman Saey May 16, 2023 at 11:00 am Death cap mushrooms get their name for a reason: The poisonous fungi can kill if ingested in even small amounts.