For decades, patients told they were low on vitamin B12 have walked out of the doctor's office with a shot in the arm. Wellness clinics now sell the same jab as an energy booster. A systematic review ...

There’s not much research on B12 shots for weight loss. People with obesity tend to have lower vitamin B12 levels, but it’s unclear if B12 shots can promote weight loss. If you have a deficiency, B12 ...

How should vitamin B 12 be administered? I have read that injections are not necessary—even for gastrectomy patients. However, some of my patients return with ...

Clinical Assistant Professor, Department of Clinical Pharmacy and Outcomes Sciences, South Carolina College of Pharmacy, Columbia, South Carolina; Clinical Pharmacy Specialist, William Jennings Bryan ...

Vitamin B12 is essential for your overall health, and ensuring your gut is functioning well is key to absorbing it properly.

Dear T.H.: Many people have strong feelings that vitamin B12 can dramatically improve their health, but it only helps to take vitamin B12 if you are deficient. Vitamin B12 deficiency isn't too common.

Pernicious anemia is an autoimmune condition in which the body cannot absorb vitamin B12 properly. A person with pernicious anemia requires lifelong vitamin B12 supplementation. Vitamin B12 is ...

Dear Dr. Roach: I am 71 years old and was diagnosed with pernicious anemia in October 2024. My B12 and folate levels were low. My antiparietal antibodies were abnormal, but the intrinsic factor ...