Indeed, chronic ROS can cause protein oxidation of methionine and cysteine residues 112,113 , which in the absence of GSH becomes permanent and might decrease irreversibly CI and CII functionality
It helps fill up B12 stores and can ease symptoms of deficiency
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Before I get into my detailed Paula's Choice 25% Vitamin C + Glutathione Clinical Serum product review just below, I wanted to explore some of the most frequently asked questions about Vitamin C and other distinguishing actives specific to the formula 1
But the companies making and promoting these peptides are not especially deserving of blind trust
This is likely due to the existence of intracellular GSH transporters and of some alternative back-up reducing systems