The Hospira (Pfizer) label, one of the most common brands, states it plainly: "Bacteriostatic Water for Injection may be used within 28 days of initial entry into the container." So mark the open date on the vial
Freeze-thaw cycling is especially destructive to peptides each cycle forms ice crystals that physically shear the molecule, so even one accidental freeze can tank a vial
For guidance, read: The Best Peptides for Recovery: BPC-157, TB500, MK-677, Ipamorelin, CJC-1295, and More Conclusion Weighing the Benefits Against the Risks BPC-157 is one of the most promising and widely used healing peptides available today
No this is normal, and your peptides are fine
Consistency is gone
Use our Peptide Calculator to compute volume, U-100 insulin syringe units, and doses per vial from peptide mass and target dose