I've seen some mention of putting various peptides in a re-purposed insulin vial for easy travel (no questions) but am unsure about actually doing it.
Mechanics seem straightfoward - empty insulin, rinse with bac water, empty again all while remaining sterile. Then just insert desired peptides.
But should I beware of any lingering insulin causing a "surprise?" It seems like the possible lingering amount would be so minimal as to not matter?
Thanks for any tips!