3. Forgetting things

Brain function is one of the primary things that concerns Vitamin B12. This is why when there is a Vitamin B12 deficiency, there is a noticeable effect on brain function more than anything else.

Forgetting things is one of the many signs that should be a trigger sign for something being wrong with your body. Again, if it persists, however, do see a doctor.

4. Muscular dysfunction

Muscles are largely dependent on nerves for their existence and when your nerves fail, they take them down with them.