how long for b12 injections to start working Injections: Who Should Get Them and Do They Last? Vitamin B/D/B12 Injections Near Ne

B12 injections are most appropriate for people with confirmed or suspected B12 deficiency

[9] No overdosage or toxicity has been recorded by the FDA

When to seek medical help See a doctor promptly if you have spreading redness or warmth around the site, discharge or a fever, numbness or weakness that does not settle, or any swelling of the face, lips or throat or difficulty breathing, which can signal a rare allergic reaction and is a medical emergency

Having the shot directly in to the muscle allows the liquid vitamin to enter the blood stream quickly, bypassing the digestive system and the gastric acids and many other obstacles anything which is taken via the mouth has to go through to reach the small intestine, for re absorption