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Studies on rats that have had a stroke show that when DSIP is administered through the nose, it leads to better motor coordination and a smaller area of damaged brain tissue (6)
Shortly after the original identification, the copper-binding role was established, and the conceptual framing shifted toward GHK as a copper-delivery peptide whose proliferation-supporting activity in the original assays reflected the role of copper in cellular biology rather than a direct growth-factor signaling activity in the classical sense
doi:10.1159/000118012 van Kammen DP, Widerlv E, Neylan TC, Ekman R, Kelley ME, Mouton A, Peters JL
Typical doses run 100 to 300 micrograms of each peptide per injection