For higher doses or when absorption is poor, they can be given through a vein
Family Medicine Physician with 20+ years in Family Medicine focused on nutrition, wellness, and whole-person health
( 11 ) However, if youre severely deficient in Vitamin B12, it may take several weeks to fully restore your levels and feel the cumulative benefits
Self-Administration Guidelines for Home Use For patients who need ongoing vitamin B12 injections, self-administration at home can be convenient
You can find Vitamin B12 naturally in animal products like clams, trout, salmon, and animal liver
In most food sources, B12 is bound to a protein molecule released by the metabolic activity of hydrochloric acid and other enzymes in the stomach