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Risk of bias (quality) assessment Two authors (AJ and SS-B) independently assessed the risk of bias of the trials according to version 2.0 of the Cochrane tool for risk of bias assessment (Reference Higgins, Thomas and Chandler13)

If your homocysteine level is high, you dont have enough B12, folate, and vitamin B6

Moreover, GSH is a principle hydroxyl radical scavenger because of unavailability of enzymatic defense against these radicals

10.1371/journal.pone.0297839 79 LiuJ.LiuL.CuiY.ZhangJ.JiangH

Any additional information required to reanalyze the data reported in this paper is available from the corresponding author upon request