While I am waiting for my jin to arrive I have acquired some european GH, it comes in boxes containing 5 vials of 4iu powdered GH and 5 amps diluent.

I held the plunger as I inserted the pin of the diluent laden syringe into the vial of powder, only to find that when I released the plunger it was not sucked in - therefore no vacuum.

My question is - will the lypholised powder still be OK given that it appears not to be in a vacuum?

I have every confidence in my source but would appreciate the reassurance.