However, the longer the symptoms are left to linger, the more permanent they can become.
People diagnosed with a vitamin B12 deficiency, following a blood test, will most likely be recommended B12 injections.
The most popular treatment option in the UK is hydroxocobalamin, because it stays in the body for longer.
“At first, you’ll have these injections every other day for two weeks or until your symptoms have started improving,” said the NHS.