Does Vitamin C brighten skin
They did not study the effects on skin pigmentation, but this study did reaffirm the rapid absorption of reduced glutathione from oral mucosa to reach high serum concentrations which can have therapeutic value in many areas
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J Physiol Pharmacol 67:235242 Adamczyk-Sowa M, Sowa P, Mucha S et al (2016) Changes in serum ceruloplasmin levels based on immunomodulatory treatments and melatonin supplementation in multiple sclerosis patients
Specifically, the selenoproteins with relatively high expressions in the brain Gpx4 , Selenom , and Selenok were significantly affected, whereas for selenoprotein W [ Selenow , an antioxidant selenoprotein with not yet fully understood functions (Whanger, 2009
That non-overlap is the foundation of everything else