Glutathione peroxidase (GPX) The GPX family comprises eight members (GPX1GPX8), which serve as classic antioxidant enzymes to mitigate oxidative stress and maintain redox homeostasis [27]
( i ) Fasting plasma GIP (n = 5 per group), ( j ) total GLP-1 (CON n = 9, Gipr AP-KO n = 8), ( k ) insulin (CON n = 5, GIPR AP-KO n = 4), (l) food intake post IPGTT (CON n = 6, Gipr AP-KO n = 6), ( m ) ad lib fed blood glucose (CON n = 6, Gipr AP-KO n = 6), (n) RER (time x group F(24, 168) = 1.739 p = 0.023), ( o ) energy expenditure (with ANCOVA using BW as covariate), ( p ) ambulatory activity (x beam breaks)
Promoting Conversion (The Shift): The second, and perhaps most important, action is that Glutathione promotes the conversion of Eumelanin (the darker pigment) into Pheomelanin (the lighter pigment) By both reducing the total amount of pigment being made and shifting the pigment type toward the lighter version, Glutathione achieves its skin-lightening effect
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