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 ...

Can vitamin B12 deficiency be a sign of cancer? Learn the symptoms, risks, connection to cancer, treatments, and why this ...

Vitamin B12 overdose is so rare that serious adverse effects from consuming large amounts of vitamin B12 have only been reported in a handful of studies in the medical literature. It’s effectively ...

Vitamins and minerals help your body function at its best. But too much or too little of a particular nutrient can sometimes cause problems. Take a fluttering heartbeat, for example. Though rare, ...

While generally safe, multivitamins can change how other medications work, affect how much medication gets absorbed into your bloodstream, or create unwanted nutrient buildup.