vit b12 injections Are Shots Safe? Royal Palm Beach Medical Group What Are B12 Injections? And

MTHFR and Vitamin B12 Absorption The MTHFR genetic mutation has a negative effect on B12 absorption, with studies showing an increased prevalence of low blood levels of vitamin B12 in those with the mutation

Deficiency of vitamin B12 and its relation with neurological disorders: A review

Because the needle stays in the fatty layer, there is less chance of catching a nerve or a blood vessel than with a deeper injection, which is one reason some clinicians prefer it for maintenance dosing

(Dali-Youcef and Andrs, 2009) Other people at risk include those who have had intestinal surgeries, or have chronic conditions which affect the gut , such as Crohns disease or celiac disease (Dahele and Ghosh, 2001)

These can lead to side effects or reactions that you may then associate with the B12 itself, even though B12 has nothing to do with them