melanotic macules gums macule a Melanotic macule at the wet–dry line of the lower lip. b Melanotic Black and Brown: Non-neoplastic Pigmentation

Another case-control study reported that individuals in the highest quintile of riboflavin status, as measured by red blood cell glutathione reductase activity, had approximately one-half the occurrence of age-related cataract as those in the lowest quintile of riboflavin status, though the results were not statistically significant (34)

Hence, low levels of serotonin, a substance essential in elevating mood, may be produced in people with vitamin B12 insufficiency

9.3 GSH-mediated cancer dynamic therapy Molecularly intelligent photosensitizers herald a new era in photodynamic therapy by leveraging tumor-specific stimuli such as redox potential, pH, and enzymatic activity to achieve highly selective activation

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Moertel CG, Fleming TR, Creagan ET, Rubin J, O'Connell MJ, Ames MM: High dose vitamin C versus placebo in the treatment of patients with advanced cancer who have had no prior chemothrerapy : A randomized double blind comparison