ghk-cu safety toxicity study Copper Peptide (GHK-Cu): Clinical Uses, Stability & Compounding Tips Copper Tripeptide-1 (GHK-Cu): The Premier
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For sub-cut , a 30G x 1/2 inch is best -really fine

10.1111/febs.14595 FEBS J

doi: 10.1146/annurev.physiol.64.081501.131029 131 SiroisJSayasithKBrownKAStockAEBouchardNDorM

Utilize saliva substitutes when necessary

Also, a 'professional' giving another an injection will be aware of libel actions if using an expired ampoule etc
