To absorb it from food or pills, your stomach must produce enough acid and a protein called intrinsic factor
B12 shots are injected intramuscularly, which means they dont have to go through the digestive system like an oral supplement
Methylcobalamin injections are generally well-tolerated, but like any injection, they can cause some local reactions at the injection site such as pain, redness, or swelling
Morris MS, Jacques PF, Rosenberg IH, Selhub J
Standard Dosage Injections of 1-2 milliliters of MIC B12 are usually recommended for supporting energy levels and overall health
If you're storing reconstituted solution at room temperature for weeks, or using it past 14 days, or exposing vials to direct light during storage, you're injecting degraded peptide fragments that retain minimal biological activity