Dr. Michael Greger has dedicated his career to studying how lifestyle choices can help us live longer. As well as eating a whole-food plant-based diet, he takes supplements daily. These include ...

Editor’s note: This column was corrected Tuesday, Dec. 29. Vitamins are substances that the body can’t make that are necessary in trace amounts for normal metabolic functioning. Vitamin B12 is made by ...

Self-medicating with vitamin B12 without a doctor’s guidance is not a good idea. Even though B12 is water-soluble (meaning excess amounts are usually flushed out in urine), taking more than your body ...