Effect of glutathione addition at harvest on Sauvignon Blanc wines

Background and Aims Polyfunctional mercaptans, such as 3-mercaptohexanol and 3-mercaptohexyl acetate, produce passion-fruit, tropical and stalky aromas in white wines such as Vitis vinifera L. Sauvignon Blanc. Oxidation processes, however, can be detrimental to the formation and stability of these desirable thiol compounds. The use of antioxidants during winemaking is most important to protect polyfunctional mercaptans from oxidation, starting...