Medically reviewed by Erika Prouty, PharmD Key Takeaways Vitamin B12 is generally safe, but rare reactions like allergies or ...

What happens if your body has too much vitamin B12? Read on to find out the dangerous side effects of having excessive levels ...

If you're not getting enough vitamin B12 from food, a supplement can help fill the gap. Here's what experts recommend for taking it.

Q: Years ago, I started taking a vitamin B12 supplement. Over the past few years, I have had disabling pain in my feet diagnosed as nondiabetic neuropathy. The primary symptoms were burning, stabbing ...

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 ...

Low on energy or focus? A doctor explains how vitamin B12 supplements can support nerves, stamina, and daily vitality.

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 ...

DEAR DR. ROACH: I am 73, and I was worried about dementia. Turns out, I am “normal.” However, the neurologist told me to take 2,000 mcg of B12 daily. My multivitamin has 100 mcg, which is 4,167% of ...

Vitamins and minerals are essential for our health but they are nutrients our bodies can’t produce on their own – so we must ...

Supplements may negatively affect sleep quality due to their ingredients, mode of action, or the timing of doses. Some vitamins, such as melatonin, promote relaxation and induce sleep. Others can act ...