JCI Insight Bile acids regulate cysteine catabolism and glutathione regeneration to modulate hepatic sensitivity to oxidative injury With Thanksgiving meals on the way, it helps to know that cysteine, an amino acid found in many protein rich holiday foods, supports gut lining repair and antioxidant balance. It also fuels glutathione Solved Select the single best answer. Glutathione, a Chegg.com Glutathione Wikipedia