b12 inject online Vitamin for Injection Cyanocobalamin 1,000 mcg, 25/Box (Rx) — Mountainside Medical it’s possible you have a B12 deficiency MIC+B12 | Energy + Mood
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[Crossref] Cohen AD, Bonneh DY, Reuveni H, Vardy DA, Naggan L, et al

Short-term storage at 28C is acceptable for active research periods but will shorten overall shelf life and is not recommended once the vial has been opened

Lots of thinking now

Check the nutrition labels while food shopping to see how much vitamin B12 different foods contain