late-night gamer here, the kind who used to keep a soda within arm’s reach during queue and now does the sparkling water + lime swap. i’ve been poking around peptide stuff for a while, mostly out of curiosity, and storage/quality is the part my brain keeps chewing on. opened a vial tonight and there was zero vacuum—no little hiss, no stopper pull, nothing. older ones i’ve handled had that pop and it made me assume that was normal. now i’m wondering if i’ve been using the hiss as a fake quality checklist. is vacuum actually required, or is it just one of those things that varies? not looking for a whole protocol, just whether anyone else has noticed this and whether it means anything.
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