On the downside, theyre more expensive and must be administered under the supervision of a healthcare professional ( Still, multiple studies have also found oral vitamin B12 supplements to be safe and effective ( Ultimately, consulting a doctor is the safest way to determine which vitamin B12 supplement is best for you
Vitamin B12 injections are medically necessary for patients with pernicious anemia, severe malabsorption syndromes, post-bariatric surgery absorption failure, or critically low B12 levels with neurological symptoms
What is Tiaminal B12 injection, and when is it used
Along the way, several factors can limit how much your body actually absorbs
Taking vitamin B 12 supplements affects the genes expressed by bacteria living on our skin, report researchers at the University of California, Los Angeles (UCLA) in Science Translational Medicine [1] on 24 June 2015