Furthermore, other symptoms are, disturbed vision, irritability, depression, changes in the way a person thinks, feels, and behaves as well as a decline in mental abilities.
The NHS recommends that a person should see a GP if: “you’re experiencing signs of vitamin B12 [deficiency]”.
While a vitamin B12 deficiency can be treated easily, the NHS does have a warning.
The warning in question is over how long the deficiency goes untreated for: “The longer the condition goes untreated, the higher the chance of permanent damage.”