You're probably storing your peptides wrong. Lyophilized (powder): Room temp OK short term, fridge preferred. Reconstituted: 2 8C mandatory. No exceptions. Never freeze reconstituted peptides. Use within 28 30 days after reconstitution. Protect from How to Store Bacteriostatic Water Safely Confused about whether BAC water needs refrigeration after opening? According to USP standards and Pfizer's own guidance, both room temp (2025C) and refrigeration are acceptable How Long Does Bacteriostatic Water Last After Opening Wittmer Rejuvenation Clinic Should BAC water be refrigerated or stored at room temperature? How to Store BAC Water After Opening Pfizer Hospira Bacteriostatic Water 30 mL Peptide Test