ghk cu injectable dosage subcutaneous ghk-cu peptide typical injection ghk-cu typical dose subcutaneous injection WO2019167070A1 GHK-Cu Peptides Before and After:
Description
Beyond this window, bacterial contamination risk increases exponentially regardless of solution appearance

Basically a study looked at 100 drugs & found that 90% of them were fully potent 15 years after their expiration date, though that may vary by drug, and perhaps liquid forms are a bit more vulnerable (perhaps)

Linkova NS, Khavinson VKh, Chalisova NI, Katanugina AS, Koncevaya EA

