But how much B12 do you need, and can you take too much of it ... body stores B12 in the liver for extended periods, deficiency symptoms may only appear years after inadequate intake.

Medically reviewed by Jamie Johnson, RDN Taking vitamins is usually good for your health, but is it possible to take too much ...

Supplementing with vitamin B12 can improve energy levels in people who are deficient in the vitamin. However, it may not ...