Mark Grenon
Mark Grenon is pictured in a still from a 2019 video where he claimed a type of toxic bleach is a miracle cure. He was convicted in 2023 for promoting the substance.
  • Mark Grenon and his three sons have been convicted of selling toxic bleach as a miracle cure. 
  • They falsely claimed the substance could cure COVID-19, prosecutors said. 
  • Insider exposed how Mark Grenon used online platforms to market the substance. 

A family from Florida has been convicted of selling a toxic bleach solution as a "miracle" medical cure in a scheme first exposed by Insider.