Subcutaneous doses go into the fatty layer beneath the skin think belly, outer thigh, or the back of the upper arm at about a 45-degree angle
While generally safe and effective, its important to use them correctly and be mindful of potential interactions with other skincare ingredients
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GHK-Cu (copper peptide GHK-Cu) is one of the best characterized plasma peptides in the literature on connective tissue remodeling a short tripeptide with the sequence glycine-histidine-lysine (Gly-His-Lys), complexed with the Cu copper ion
Importantly, it achieves these effects without impacting blood sugar levels or insulin sensitivity