what level of b12 requires injections Injection Dosage and Frequency: 7 Guidelines for Adults How Vitamin B12 Injection Dosage

But if your B12 is high without supplementation , it can be a marker for underlying conditions that require medical evaluation, including liver disease, kidney dysfunction, and certain cancers

[DOI] [PubMed] [Google Scholar] 157.Erickson JC, Hollopeter G, Palmiter RD

What should I do if my symptoms return before my next B12 shot

People with kidney conditions should be cautious with high-dose B12

This method delivers the vitamin directly into the bloodstream, bypassing the digestive system entirely

synthesized by certain bacteria Although the intestinal flora of humans is able to synthesize vitamin B 12 , humans are not able to absorb bacteria-generated vitamin B 12 since the location of synthesis (the colon) is too distal from the location of absorption (the small intestine)