how long for vitamin b12 injection to take effect What Is What's all the Buzz About B12 Shots? How Long Does It Take

[20] Treatment of megaloblastic anemia with concurrent vitamin B 12 deficiency using B 12 vitamers (including cyanocobalamin), creates the possibility of hypokalemia due to increased erythropoiesis (red blood cell production) and consequent cellular uptake of potassium upon anemia resolution

It is important to continue with the prescribed course of injections even if you do not feel immediate improvement

AOD9604 caused only a modest weight increase, which was statistically significant only on the last day of the 14-day treatment period

Results may vary among individuals, and it may take several weeks or months to see visible changes