Vitamin B12 is essential for several functions in your body. Some vegetarian sources of vitamin B12 include eggs, dairy products, nutritional yeast, and nori. Share on Pinterest Vitamin B12 is an ...

Meeting the minimum requirement for vitamin B12, needed to make DNA, red blood cells and nerve tissue, may not actually be enough – particularly if you are older. It may even put you at risk for ...

Your doctor will give you the right dosage of vitamin B12 supplement, especially if you will inject it. Taking too much can cause side effects like nausea, headache, dizziness, and, in some cases ...