glutathione tablets in medical stores Jarrow Formulas® Reduced Intracellular Antioxidant Capsules 500 mg, 60 ct Acetyl-Glutathione 100 mg
Description
Oncogene 21 , 48634871 (2002)

If your deficiency has caused neurological symptoms, that loading phase can run longer before maintenance begins

Fjell CD, Jenssen H, Fries P, Aich P, Griebel P, Hilpert K, Hancock REW, Cherkasov A: Identification of novel host defense peptides and the absence of -defensins in the bovine genome

From all the reading Ive done, Ive only ever heard mention of acid hydrolases that become active at lysosomal pH, so pH 5.0 or so see for instance [Cooper 2000 Chapter 9 - Lysosomes]
