Answer:
Glutathione has always existed in the human body, and it was first discovered in 1888, well over 100 hundred years ago, by J. de-Rey-Pailhaide, viewing it under a microscope while studying the human eyeball. It was discovered in time that a healthy human eyeball is very high in glutathione.
Now, in 2011, if you go to pubmed.gov where all published, peer-reviewed medical studies are displayed, you will find over 97,000 references to it and its impact on your cellular health.
You can learn more about glutathione here.
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