Signs of a severe allergic reaction include trouble breathing, hives breaking out on the skin, swelling of the face and throat area, a fast heartbeat, or feeling like you might pass out
Perhaps more common in severe B12 deficiency is an autoimmune Atrophic gastritis which is when your immune system attacks healthy cells in your stomach lining and it is these cells that produce the Intrinsic Factor
This guide explains what different pee colors mean, when to see a doctor, and how factors like diet, hydration, and medication play a role
For patients who could achieve the same results with oral supplementation, the cost difference is substantial and worth discussing with your provider
IOM Recommendations for People Over Age 50 Appendix F
Side effects are rare but may include mild soreness at the injection site or a slight warmth in the body