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5mL Vial | 10mL Vial | 30mL Vial Bacteriostatic Water for Injection, USP is a sterile, nonpyrogenic preparation of water for injection containing 0.9% (9 mg/mL) of benzyl alcohol added as a bacteriostatic preservative

Thats because the test reading (the color the test strip turned) continues to change after the strip is removed from the sample

Either copper peptide alone works if availability or tolerance is a constraint

In the forced swimming test, PE-22-28 reduced immobility time comparably to the SSRI fluoxetine

Sikiric P et al., "Pentadecapeptide BPC 157 and the central nervous system," Neural Regeneration Research, 2022