oral glutathione bioavailability randomized trial increases blood glutathione Vitamin C and supplementation: a review of their additive effects on exercise performance Randomized Clinical Trial of How
Description
A preservative doesn't stop oxidation of vitamin C itself, but it does help protect the formula from microbial contamination
doi: 10.1111/j.1572-0241.2003.07506.x
Some, like GHK-Cu, are also available in topical forms
Interestingly, a link exists between increased oxidative stress biomarkers and performance or recovery
