feeling tired after vitamin b12 injection why do i feel my tired all the time or experiencing tingling and numbness? Low B12 levels could be one of Why Do I Feel Worse

The last place where you can get B12 shots is at mini clinics

IV doses of 25-400 mcg/kg for safety studies Important: These are experimental doses used in animal studies and cannot be extrapolated to other species due to significant differences in metabolism, pharmacokinetics, receptor expression, peptide degradation rates, and tissue distribution patterns

Actually, the person writing this serious accusation does not realize that approximately half the people with symptomatic B12 deficiency have serum B12 concentrations within the so-called normal range for the general population

Wolffenbuttel BHR, Muller Kobold AC, SobczyskaMalefora A, Harrington DJ