Melanotan II in powder form - freezer
Reconstituted melanotan II - refrigerator
The melanotan II in the freezer will last for many months without degrading.
The reconstituted melanotan II will begin to degrade around 2 weeks in the fridge.
An alternative to keeping reconstituted vials in the fridge is preloading syringes. If you plan to get 6 injections out of your vial, then draw your dose into all 6 syringes at the same time. Place them in the freezer. When you are ready to inject, take one out, let it sit at room temp for 5 minutes (to thaw), then inject.