Vitamin B12 deficiency can cause a range of symptoms, affecting energy levels, nerves, and cognitive functions such as; Feeling tired or weak, even after rest, Shortness of breath or dizziness, ...

Allergic reactions to vitamin B12 are rare, but real. The reason may sound strange, but it's true - an allergy to cobalt.

Learn how to spot vitamin B12 deficiency symptoms early and find the best ways to incorporate it into your daily routine.