Are you experiencing unexpected fatigue, tingling fingers or hair loss? While this could be the result of a variety of health conditions, it could also signal a vitamin deficiency. — 45% for ...

Vitamin B12 is a water-soluble vitamin typically found in animal products. In the U.S., about 6% of U.S. adults younger than 60 have a vitamin B12 deficiency, but that rate jumps to about 20% for ...

To put it plainly, a failure to treat a B12 deficiency can have serious consequences. As Dr. Lapa puts it: “In extreme cases, B12 deficiency can lead to severe and potentially irreversible symptoms.