US$ 21.56
efficacy of vitamin b12 injections Benefits for Optimal Health Sublingual B12 vs. B12 Injections:
Description
Annual review of nutrition , 21 (1), 407428

Orally administered supplements from a big box store cost as little as $30 for a full year's supply of tablets
You get the same professional care you'd receive in a clinical setting, but in the comfort of your own space

This approach works well for prevention and for treating mild to moderate deficiency