Vitamin B12 is important for the health of your nervous system and your red blood cells. It can be found in many animal products and fortified foods. In the United States, about 6% of people under age ...

Injections deliver liquid medications, fluids, or nutrients directly into a person’s body. Different types of injections include intravenous, intramuscular, subcutaneous, intraosseous, and intradermal ...

Vitamin B12 is a key building block for the brain, and evidence suggests that vitamin B12 deficiency is linked with treatment-resistant depression, anxiety, panic disorder, and even cognitive decline ...

Although some people claim vitamin B12 shots can help with weight loss, experts do not recommend them. They can cause side effects and, in some cases, allergic reactions. According to a 2019 study, ...

Dear Dr. Blonz: I have pernicious anemia, for which I receive B12 injections. Why is it that intrinsic factor cannot be synthesized and introduced into the body by injection or pills? It seems as ...

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 ...