It is both safe and effective in raising blood glutathione levels in humans
In practice, many people choose both: glutathione for the mirror, NAD+ for the decades
doi: 10.1038/nature13595 8 SellgrenCMGraciasJWatmuffBBiagJDThanosJMWhittredgePBet al
In addition, bulk drug substances must be accompanied by a valid certificate of analysis and must have been manufactured by an establishment registered with FDA
Several private laboratories offer chemosensitivity testing, including: Nagourney Cancer Institute Weisenthal Cancer Group Huntington Beach, California, USA Helomics Pittsburgh, Pennsylvania, USA BioFocus Recklinghausen, Germany Genostics New South Wales, Australia Research Genetic Cancer Center Ltd
Since baseline collagen production is known to decline roughly 1% per year starting in the mid-20s, a compound that reactivates a suppressed signaling pathway rather than simply adding raw material is mechanistically interesting in a way that most topical actives aren't