what part of the body do you get b12 injections Best Vitamin Injection Sites How to Inject Vitamin B12

Oral: Oral B12 supplementation relies on adequate levels of stomach acid and other enzymes for efficient metabolism and absorption

As a general rule, IM is favored when the goal is rapid correction of a clinical deficiency, when the patient has difficulty absorbing B12 through oral or sublingual routes, or when a provider wants predictable peak serum levels

To validate these hypotheses, further experiments are necessary

Cholesterol and glucose tests may require fasting for 812 hours

If you have pernicious anemia, you may see improvement relatively quickly, says Miller, since it only takes three to four days after a shot for your body to begin producing red blood cells