Yes, you can draw some air in the syringe and turn it over a few times allowing the bubble to mix the peptide/bac. Also when drawing the pep in the vial in you can push it back in again to draw it out again if you want. Of course this still gets filtered into pen carts afterwards

@Nuncles Great idea here you go https://community.peptidecritic.com/topic/3255/poll-what-s-your-favorite-peptide-pen