Qingdao Sigma Chemical Co., Ltd (International, US, EU, Canada and Australia domestic

Has anyone noticed their QSC vial losing their vacuumed state? I reconstituted a vial of TB500 and was surprised to see that my syringe/bac water wasn't being pulled in, i.e. there's no longer a vacuum. Previous vials from the same kit did have a vacuum though.

Filtered that but it makes me iffy whenever I inject it
My Semaglutide has been 50/50 so far. Got 20 of them so still finding out. Works like an MF though!
 
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