Memory loss and a loss of neurons is related to below normal B12 levels
A 55-year-old woman suffered an allergic reaction after her second dose of an intramuscular cyanocobalamin B12 shot
Furthermore, there were no significant negative impacts on liver function, renal function, hematology, or vital signsduring or after the supplementation period Supplementary Tables 24
Every batch is tested for pH, sterility, and 0.9% benzyl alcohol concentration before it ships
If you are running higher weekly doses like 10 mg or 15 mg, the concentrated solution means less fluid per injection
That being said, lets imagine for a moment that there were no expiration dates