b12 vitamin vs injection What Is What's all the Buzz About B12 Shots? Vitamin B12 Oral vs Injection​

It is not appropriate during pregnancy or breastfeeding, in active cancer, or in patients with severely uncontrolled metabolic disease without specialist coordination

[16] Although cyanocobalamin lacks a defined upper-toxicity threshold due to its water solubility and renal elimination, exceptionally high cumulative doses have been temporally associated with acneiform eruptions, altered potassium homeostasis, and theoretical thrombotic risk, emphasizing the importance of evidence-based dosing

concerns regarding unpredictable absorption The mechanism for the oral route is based on passive absorption of vitamin B 12 (without binding to intrinsic factor) as well as active absorption (following binding to intrinsic factor, if present, e.g

Revised: June 2007 (9th version)