Hello. Treatment for Vitamin B12 deficiency depends on its severity and cause. For mild deficiencies, daily oral supplements of Vitamin B12 (typically Methylcobalamin, 1000 mcg) are highly effective. However, if your deficiency is severe or due to absorption issues (like pernicious anemia), you will likely need intramuscular B12 injections administered by a healthcare professional, usually starting weekly and moving to monthly. I highly recommend consulting your doctor to review your specific test levels so they can prescribe the correct dosage and form. Incorporating B12-rich foods like dairy, eggs, and fortified cereals into your diet will also support your recovery.