B12 intramuscular injections are immediately available to the body as opposed to oral B12 supplements. Injections that go directly into the blood stream avoid absorption barriers and can benefit people with malabsorption problems such as those who have undergone intestinal surgeries or have diseases that affect their intestines ability to absorb crucial vitamins and minerals our bodies need.

The intramuscular injection is administered via needle to either the arm or buttocks once a week for 6 weeks with a monthly maintenance  injection thereafter for the remainder of the year.