FDA highlights concerns with using dietary ingredient glutathione to compound sterile injectables FDA Frontiers Rhoifolin Alleviates Alcoholic Liver Disease In Vivo and In Vitro via Inhibition of the TLR4 NF B Signaling Pathway Leucovorin (also called folinic acid) is a folate analog and chemoprotective agent. It's used to rescue healthy cells from the toxic effects of high dose methotrexate, to enhance the effectiveness of fluorouracil (5 FU) Ask the Doctors What do glutathione supplements do? UCLA Health ACG Glutathione Extra Strength