Some common medications can lead to vitamin and mineral deficiencies. Learn which medications can interact in this way.

Vitamin B12 is essential for blood formation, nerve and brain function, and energy metabolism. Deficiency is common in vegetarians, older adults, and malabsorption states and causes fatigue, ...

If you have kidney disease, speak with your doctor or healthcare professional before taking vitamin B12. Depending on the current health of your kidneys, there may be risks and benefits to taking B12.