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is glutathione injection results permanent Brightening Shots Glutathione Injection: Benefits, Safety, &
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The Journal of Immunology 181, 680689 (2008)

Too much signal and you waste money without additional benefit, the response curve plateaus rather than climbing indefinitely

10.1016/j.freeradbiomed.2011.10.444 [DOI] [PMC free article] [PubMed] [Google Scholar] 66.Jonus H, Hanberry B, Khatu S, Kim J, Luesch H, Dang L, et al

One possible scenario is the metabolic cofactor NADPH, which is known to be required not only for lipid synthesis but also for the function of antioxidant reductases, such as glutathione reductase (GSR) and thioredoxin reductase (TXNRD) 86

Am J Physiol Endocrinol Metab 261(1):E26E30
