Each configuration has advantages depending on the facility's design and operational needs
Hirotsu C, Rydlewski M, Araujo MS, Tufik S, Andersen ML

BPC-157 (5mg vial) Water: 2ml bacteriostatic water Concentration: 2500mcg/ml Typical dose: 250mcg = 0.1ml (10 units) Doses per vial: 20 injections TB-500 (5mg vial) Water: 2ml bacteriostatic water Concentration: 2500mcg/ml Typical dose: 2500mcg = 1ml (100 units) Doses per vial: 2 injections Semaglutide (5mg vial) Water: 2ml bacteriostatic water Concentration: 2500mcg/ml (2.5mg/ml) Starting dose: 250mcg = 0.1ml (10 units) Maximum dose: 2400mcg = 0.96ml (96 units) Ipamorelin (5mg vial) Water: 2ml bacteriostatic water Concentration: 2500mcg/ml Typical dose: 200mcg = 0.08ml (8 units) Doses per vial: 25 injections Safety and sterile technique summary The fundamentals that keep you safe: Before reconstitution: Wash hands thoroughly Use clean workspace Check peptide powder appearance (should be white/off-white) Verify bacteriostatic water (not sterile water) During reconstitution: Clean both rubber stoppers with alcohol Let vials reach room temperature Inject water slowly down vial wall Never shake, only gentle swirl Verify complete dissolution before storing After reconstitution: Refrigerate immediately (36-46F) Label vial with name, concentration, date Use within 28 days maximum Check for cloudiness before each use For every injection: Clean rubber stopper with alcohol Use new sterile syringe every time Rotate injection sites Dispose needles in sharps container Track doses remaining Follow these rules and you'll never have problems

For most researchers, a 30 mL vial provides enough water for multiple peptide reconstitutions while remaining well within its shelf life
The article helped me with that and a few other questions I had along the way
BPC-157 has been shown to influence bleeding time and blood pressure in some studies, which could potentially interact with anticoagulants or blood pressure medications