If you are using it on the skin to fight off skin infections, acne or wrinkle, all you need to do is dab a small piece of cotton in a dilute solution of Apple cider vinegar and water and apply it over the affected area
This simple step can meaningfully extend shelf life, especially if your refrigerator has an internal light that turns on every time you open the door
This matters if the goal is fat loss without losing muscle
A 2007 Seoul National University study showed GHK-Cu stimulated follicle elongation and dermal papilla cell proliferation at concentrations as low as 10^-12 M (Pyo et al., 2007)
But unauthorized peptides the kind sold online, through personal trainers, or via unverified compounding pharmacies carry real risks
Hatzipanagiotou A, Rieland E, Enbergs H: Lysozyme activity in the milk of sucking mares during lactation