A vitamin B12 blood test is a reliable way to determine if you have adequate levels of this crucial nutrient. Vitamin B12 is essential for nerve function, making red blood cells, and helping your body ...

Millions of Americans take a daily vitamin, assuming it is doing something. That assumption is not always correct. The gap between what you swallow and what your body absorbs widens with age. The only ...

Dear Doctors: I was surprised when a blood test at my annual checkup found I’m low in B vitamins, especially B12. My doctor gave me a shot, and the fatigue that I had been feeling went away. Why is ...

Plus, exactly how they manifest.

Vitamin B12 is found only in animal foods, but in good amounts. So unless you’re a vegan, chances are you’re getting plenty of it in your diet. Yet many older adults are deficient in the vitamin. Why?

Experts think certain non-routine tests are worth asking your doctor about, since the results could point to health-saving ...