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As humans age, their natural levels of GHK decline, going from around 200ng/mL in the plasma of a 20-year-old to 80ng/mL in a 60-year-old
Conceptualization, Funding acquisition, Supervision, Writing-review & editing Acknowledgments We thank the high-field NMR facility at the Korea Basic Science Institute (KBSI, Ochang) and the GIST Advanced Institute of Instrumental Analysis (GIST, Gwangju) for allowing us to use their NMR spectrometers
On the other hand, Takeuchi et al
10.1152/ajpgi.00183.2002 Am J Physiol Gastrointest Liver Physiol
If you do a search through scientific articles, you will see tons of published studies dating back over a decade showing the benefits of glutathione
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