negative effects of vitamin b12 injections B-12 Benefits | Uses | Side Side Effects of Vitamin B12
Description
Sources: MedlinePlus Vitamin B12

An over-the-counter pill has to survive digestion, and the body absorbs only a small fraction of it

11) Vitamin B12 is required to make red blood cells

People who have stomach stapling or other forms of weight-loss surgery are also more likely to be low in vitamin B12 because the operation interferes with the bodys ability to extract vitamin B12 from food