Figure 2: Proposed metabolic pathways of organosulfur compounds from garlic. GSH, glutathione (γ-Glu-Cys-Gly); GSSA: S-allyl mercaptoglutathione (γ-Glu-Cys-(S-allyl)-Gly); GSSG: oxidized glutathione; SAM: S-adenosyl methionine; and SAH: S-adenosyl homocysteine; R1 or R2: saturated or unsaturated group; NATs: N-acetyl transferases. Derived partially from the work by Lawson and Wang [34] as well as Jin and Baillie [38].