ghk-cu immunogenicity compared to other peptides GHK-Cu: The Peptide That Transforms Skin and Tissue Health – Calibrate IV GHK-CU – Peptide Foundry
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doi:10.1152/jappl.1999.87.6.2274 Nair KS, Rizza RA, O'Brien P, et al

This is where localized administration becomes so attractive from a research standpoint

While much of the conversation around peptides comes from social media and fitness communities, there is also ongoing scientific work including here in Canada exploring their potential role in medicine

Hospira Bacteriostatic Water: Industry Standard for Research When researchers search for Hospira bacteriostatic water, they are typically referring to the Hospira/Pfizer brand of bacteriostatic water for injection one of the most widely recognized brands in pharmaceutical and research settings
