Analyses using the Broad Institutes Connectivity Map suggest GHK may regulate more than 4,000 human genes, resetting aging-associated patterns toward profiles characteristic of younger tissue.23 In human plasma, GHK concentrations decline from approximately 200 ng/mL at age 20 to roughly 80 ng/mL by age 60a decline coinciding with the noticeable decrease in regenerative capacity that every aging athlete experiences firsthand
Sharma, I., Ching, E., Saini, S., Bhardwaj, R
Its also important to note that scientists are unsure as to how the body responds to a synthetic glutathione supplement and there is currently no standardized safe glutathione dosage
(2,4) In 1990, a ground-breaking study reported that in men aged 61 to 81, six months of intravenous GH therapy reversed physiological changes incurred during 10 to 20 years of aging