B12 supplements can come in a variety of forms — spray, liquid, capsule — which can make it difficult to know what to buy.

Since your body stores B12 in the liver for extended periods, deficiency symptoms may only appear years after inadequate intake. The Recommended Dietary Allowance (RDA) for vitamin B12 varies by ...

Meeting the minimum requirement for vitamin B12, needed to make DNA, red blood cells and nerve tissue, may not actually be enough – particularly if you are older. It may even put you at risk for ...