Vitamin B12 deficiency can be caused by poor diet or malabsorption, leading to fatigue, muscle weakness, and memory problems.

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 ...

You cannot overdose on vitamin B12 since it is a water-soluble vitamin. skaman306/Getty Images You cannot overdose on vitamin B12 because any excess you simply pee out. If you get b12 shots, you may ...

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, ...