The first study on X39 elevating GHK and GHK-Cu has now been published:

International Journal of Healing and Caring

https://www.ijhc.org/blog-search?searchTerm=x39

Click to access Connor%20M%20%2020-2F.pdf

Click to access Connor%20C-20-2FP.pdf

There are a number of published studies which show how GHK-Cu improves stem cell mobilization as well as conversion of the stem cells in the skin to pluripotent stem cells.  I have a full reference list on this but here are two as an example.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4508379/

http://www.lidsen.com/journals/geriatrics/geriatrics-02-03-009

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Or Call Kathy @ 209-652-2257