Topical GHK-Cu serum shelf life Pre-made commercial serums: Usually 6-12 months unopened 3-6 months after opening Check manufacturer recommendations Refrigerate after opening extends life DIY serums (mixing powder with carrier): Shorter shelf life than commercial 2-4 weeks typical (no preservatives) Must refrigerate Discard if color changes Factors affecting topical shelf life: Preservatives: Extend significantly pH: Neutral pH more stable Carrier: Some better than others (hyaluronic acid, glycerin good) Storage: Cool, dark, sealed Contamination: Sterile technique critical Best practices for topical GHK-Cu: Buy small bottles (use within 3-6 months) Refrigerate after opening Don't double-dip (pour into hand, don't touch dropper to skin) Watch for color changes (brown = oxidized) Replace every 6 months even if looks fine See our how to reconstitute peptides , bacteriostatic water for peptides , and how long reconstituted peptides last in fridge
AOD-9604 administers subcutaneously, meaning into the fat layer just beneath the skin
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Hims & Hers had been selling compounded injectable semaglutide since 2024, positioning it as an affordable alternative to branded GLP-1 drugs during a supply shortage
Heat accelerates all degradation pathways, but with GHK-Cu it also increases the rate of copper-catalyzed oxidation
For laboratory research use, the safest sources are US-based suppliers that publish independent, batch-specific Certificates of Analysis and ship domestically to protect temperature-sensitive material
