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Description
Yes, Glutathione is naturally produced by the body and is generally well-tolerated

9 BoniniM.FiorettiD.SargentiniV.Del GiaccoS.RinaldiM.TranquilliC.et al (2013)
The obtained dependences were strictly linear with R2=0.9997 for GSH and R2=0.9936 for GSSG

APPL and/or APPL2 purified antigen bound to a solid surface or cells bearing either of these, an unlabeled test immunoglobulin and a labeled reference immunoglobulin

Many of these studies have reported inconsistent findings regarding its association with cancer risk
