6 best vitamin B12 supplements to take, according to an expert - These are the best B12 supplements on the market, according to a nutritional therapist ...

But does vitamin B12 give you energy? While more studies are needed to see how vitamin B12 affects metabolism in humans, there has been research on the effects of a vitamin B12 deficiency.

Vitamin B12 supports the health of blood and nerve cells, but some people's bodies are unable to absorb it. In this case, a doctor may recommend injections.

Dear I.F.: The DV (a replacement for what we used to call the recommended daily allowance, or RDA) for vitamin B12 is 2.4 mcg ...

Vitamin B12 deficiency can cause a number of strange sensations, like numbness, tingling, and more. “It felt like electricity ...

A vitamin B12 deficiency can be easily diagnosed with a blood test, and it's important to spot the signs early on to prevent irreversible damage to the body ...

Common symptoms of a vitamin B12 deficiency include tiredness, headaches, and mouth ulcers. However, two signs appearing on your skin could also indicate a lack of this nutrient.

Many vitamin B12 supplements contain much more of the vitamin than the body needs. No research has yet found any side effects from taking too much vitamin B12. Learn more here.

Vitamin B12 is essential for good health but some people struggle with B12 deficiency. We consulted an expert to find the best B12 supplements for every need ...