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Sterile water (USP) does not contain a preservative

For the full protocol temperatures, timelines, and freeze-thaw specifics see the dedicated storage guide and our storage best practices reference, backed by peptide stability research in the peer-reviewed literature

Viscosity is a critical quality attribute because it directly affects pump performance (higher viscosity requires more force to actuate), valve function, and droplet size distribution (more viscous formulations tend to produce larger droplets with reduced aerosol fineness)

Vitamin B12, or cobalamin, is an essential nutrient for the body