how to give yourself vitamin b12 injections Best Injection Sites: Where Inject B12 · PA Relief Instruction Guide for Intramuscular (IM)
Description
The injection provider can administer the B12 shot deep into the muscle (intramuscularly) or into the tissue layer between the skin and the muscle (subcutaneously)
Neuroprotection & cognitive function investigations

Several things influence how long a B12 injection lasts for you: Your current B12 levels: the lower you start, the more your body tends to hold on to, which can stretch the effect

[1] Niacinamide in high doses can sometimes cause nausea, heartburn, or a sensation of warmth