vitamin b12 injection how long does it take to work Are Shots Safe? Royal Palm Beach Medical Group How Quickly Does Vitamin B12

Neomycin, colchicine, para-aminosalicylic acid, or excessive alcohol intake longer than two weeks may cause malabsorption of vitamin B12. Chloramphenicol and other drugs having bone marrow suppressant properties may cause a lack of therapeutic response to vitamin B12

In general, most people can expect the effects of a B12 injection to last for several weeks to months

While oral substitutes have shown some effectiveness according to studies, their ability to match the efficacy of intramuscular vitamin B12 remains uncertain

This, of course, doesnt necessarily mean that the low B12 is whats causing the weight gain

The injections deliver a concentrated dose of this vital vitamin directly into your bloodstream for rapid absorption, making it especially beneficial for those who may have absorption issues