nac or reduced glutathione The mechanism of action of N-acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species NAC vs Glutathione: Which Antioxidant
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Study 5: Pickart 2008, Haarwuchs Was sie taten: Tierische und menschliche dermatologische Experimente mit Stimulation der Haarfollikel

And then one of the biggest things that were seeing is this buildup of environmental toxins

[DOI] [PMC free article] [PubMed] [Google Scholar] 100.Xu W, Wang X, Tocker AM, Huang P, Reith ME, Liu-Chen LY, Smith Iii AB, Kortagere S
Cell 37 , 299310 (2010)