Mixing and storage

Wipe both stoppers with alcohol and let them dry fully. Angle the needle so the stream runs down the glass wall, never straight onto the powder cake, then swirl gently and never shake. Unopened vials sit at room temperature, cool, dark and dry. Once a peptide is mixed into it, the vial lives in the fridge at 2 to 8 degrees and is used within about 28 days, and it is finished early if the liquid ever turns cloudy or coloured. This vial is set aside for newborns, where preservative-free water is used instead.