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The name Delta Sleep-Inducing Peptide is actually misleading, because this compound does far more than just promote restorative sleep
Harman SM, Metter EJ, Tobin JD, et al
Working with fibroblast cultures, they demonstrated that GHK-Cu stimulated collagen synthesis at concentrations beginning between 10 picomolar and 100 picomolar, with peak stimulation at 1 nanomolar
(PubMed) Bowman GL, Dodge H, Frei B, et al
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