At least one person has died from a fecal transplant, in the following study: https://www.npr.org/sections/health-shots/2019/06/14/732870456/be-careful-of-fecal

At least one person has died from a fecal transplant, in the following study: https://www.npr.org/sections/health-shots/2019/06/14/732870456/be-careful-of-fecal-transplants-warns-fda-after-patient-death https://www.npr.org/sections/health-shots/2019/06/14/7328704... Not sure how well tracked it is for less-official/more DIY attempts. Lots of others have had positive effects, but there's definitely some risk involved.