feeling tired after b12 injections is it normal to feel a injection tired, low on energy or feeling tired after vitamin b12 – why am i still tired

A 1,000 mcg tablet and a 1,000 mcg injection contain the same amount but are absorbed very differently, and oral absorption varies widely from person to person

Only approximately 1-4% gets absorbed via the gut, so taking B12 sublingually is the best absorption avenue (holding it under the tongue or between the gums and cheek is most common)

Side Effects MIC+B12 injections combine a blend of lipotropic agents (Methionine, Inositol, and Choline) with Vitamin B12

doi:10.1210/endo.142.12.8522 Heffernan MA, Thorburn AW, Fam B, et al

References inline as available

This is a complex question that depends heavily on the specific peptides stability