A vitamin B12 deficiency can cause a burning mouth, red tongue, and dry lips. Knowing the signals can help you know when to ask for a blood test to check levels.

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 ...

A new scientific review weighs natural and synthetic forms of vitamin B12, revealing where methylcobalamin may outperform standard supplements and why deficiency remains a clinical blind spot. Study: ...

Low vitamin B12 makes it hard for your body to renew cells in your mouth, leading to inflammation. If you have low levels of vitamin B12, you may notice a sore mouth or a red, smooth tongue without ...