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The objective of this study was to describe patient-reported outcomes in a population of individuals who have been prescribed intranasal reduced glutathione, (in)GSH

It might look red and have small bumps all over

According to one study [8] in particular, glutathione helps reduce oxidative stress by either stimulating or reducing the bodys immunological response

So the old advice of drink soup when you are sick still stands

The other vegans might have malabsorption issues and are likely a self-selecting population given that people suffering from a nutrient deficiency would be more likely to seek out nutrition counseling