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GHK-Cu for Skin: SIGNAL's Guide to Rejuvenation https://lookaside.instagram.com/seo/google_widget/crawler/?media_id=3911629390741597117 18+ Once reconstituted: Store at 2–8 °C for short-term laboratory use For extended storage, aliquot and freeze at −20 °C or below Minimize freeze–thaw cycles using single-use aliquots Protect from prolonged light exposure Gently swirl to mix Variant:3 ml

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