from what amino acids is glutathione derived The Glutathione System: A Journey
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The relationship between the leptin/ghrelin ratio and meals with various macronutrient contents in men with different nutritional status: A randomized crossover study

Additionally, NAG has been shown to disrupt the biofilm formation of pathogenic bacteria, helping to gently modulate the gut microbiome and reduce localized inflammation without the use of harsh antimicrobials

As dietary supplements are often marketed with questionable claims not supported by science
(PubMed) Fischer LM, da Costa KA, Kwock L, Galanko J, Zeisel SH

10.1007/s10787-006-1531-7 72 SikiricP.SeiwerthS.BrcicL.SeverM.KlicekR.RadicB.et al (2010)

Some clients report feelings of light-headedness or an unusual feeling of pressure in their body when the dosage is too high
