500 mg l-cystine and 250 mg l-glutathione w/L-Cysteine Source Naturals Reduced Glutathione, 250
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Deciding between these two can be simple once you understand your goals
Oxidative stress, mitochondrial DNA mutation, and apoptosis in aging

Therefore, these results showed that high serum Li levels were closely and positively associated with unexplained miscarriage

doi:10.1002/ptr.3502 Rodrguez-Ramiro I, Ramos S, Bravo L, Goya L, Martn M (2011) Procyanidin B2 and a cocoa polyphenolic extract inhibit acrylamide-induced apoptosis in human Caco-2 cells by preventing oxidative stress and activation of JNK pathway
