Low vitamin D levels can cause muscle weakness, cramps and bone pain. You'll generally feel muscle weakness in your upper ...

Allergic reactions to vitamin B12 are rare, but real. The reason may sound strange, but it's true - an allergy to cobalt.

If you regularly feel fatigued or weak, you may have an iron deficiency. Here are some common symptoms, causes and ways to ...

Changes associated with anemia tongue are called glossitis, otherwise known as tongue inflammation. This article explains why ...

Learn how to spot vitamin B12 deficiency symptoms early and find the best ways to incorporate it into your daily routine.