VITAMIN B12 supports the vital functioning of the body so it's little wonder that low B12 causes a torrent of problems.

While some of these problems can seem harmless, others can indicate "possible nerve damage" warns Holland and Barrett. Vitamin B12's contribution to the body is invaluable.

It plays a key role in the production of red blood cells, as well as in your DNA, and the normal functioning of your nervous system. In regards to the latter, falling short of the required amount of B12 can cause nerve damage. According to Holland and Barrett, "this symptom is a reflection of possible nerve damage or nerve issues".

How? The health body explains: "Vitamin B12 is important for the metabolic process that produces myelin. Myelin surrounds your nerves in order to protect and insulate them.