sermorelin and bpc 157 Sermorelin: Benefits, Mechanism & Research Guide Comparing Sermorelin and BPC 157:

Vitamin B12 is essential for healthy red blood cells and nerve function, and when levels are low, symptoms can build gradually and be easy to dismiss as stress, sleep, or a busy life

J Pharmacol Sci 95:1926 Medvidovic-Grubisic M, Stambolija V, Kolenc D, Katancic J, Murselovic T, Plestina-Borjan I, Strbe S, Drmic D, Barisic I, Sindic A, Seiwerth S (2017) Hypermagnesemia disturbances in rats, NO-related: pentadecapeptide BPC 157 abrogates, l-NAME and l-arginine worsen

This can increase the risk of B12 deficiency

Yes bacteriostatic water must be refrigerated at 28C immediately after the first needle puncture and used within 28 days