do i need to take vitamin c with glutathione or C? Which is better for dark spots and dull skin 35% Vitamin C+ Perfecting Serum
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2015 Oct;86(4):844.e7-844.e14

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An imbalance that results in reduced NO production or increased ROS creation promotes endothelial dysfunction

however, the change was not statistically significant

Moreover, oxidative stress biomarkers have not been assessed in most studies

NAC is a source of cysteine, an amino acid precursor for the synthesis of glutathione production