It is more effective to eat foods rich in sulfur and amino acids (like garlic, onions, and cruciferous vegetables) which give your body the building blocks to produce its own glutathione internally
56,6062 NAC can be delivered as either intravenous (IV) or oral (PO) preparations, with dosing based on the patients body weight (maximum dose of 110 kg for oral and 100 kg for IV)
Food Chem 105:727735 Encarnacion AB, Fagutao F, Hirayama J, Terayama M, Hirono I, Ohshima T (2011) Edible mushroom ( Flammulina velutipes ) extract inhibits melanosis in Kuruma Shrimp ( Marsupenaeus japonicus )
Conclusion If you take glutathione supplements the right way, many good things can happen for your health, skin, and immune system