I started Glycine plus NAC several months ago after that article came out. However, after investigating NAC a bit further I decided there was way too much serious negative research associated with NAC. I wish someone would show that the following papers are inaccurate or not applicable. But I have posted them on several sites and gotten no response so I continue to just take Glycine and hope that taking it alone is sufficient.
The antioxidant N-acetylcysteine protects from lung emphysema but induces lung adenocarcinoma in mice
" NAC treatment decreased lung oxidative damage and cell senescence and protected from lung emphysema but concomitantly induced the development of lung adenocarcinoma in 50% of JunD-deficient mice and 10% of aged control mice."
Antioxidants can increase melanoma metastasis in mice
"These results demonstrate that antioxidants and the glutathione system play a previously unappreciated role in malignant melanoma progression. "
Increased risk of knee osteoarthritis in patients using oral N-acetylcysteine: a nationwide cohort study
“Also, in analyses stratified by age group and sex, all subgroups exhibited a significantly higher incidence of knee osteoarthritis (P < .0001) among NAC users than among NAC nonusers. The use of oral NAC was associated with nearly four-fold increased the risk of knee OA in the young age group.”