When a patient with suspected ataxia is diagnosed with B12 deficiency, they should be referred to a haematologist.
Other neurological symptoms may manifest with the condition which may not involve movement and muscle, however.
Olfactory dysfunction, in the form of odour hallucinations or an inability to eat certain foods, known as parosmia, dysosmia or phantosmia, are all known complications of low B12.
Practical Neurology explains: “Parosmia is a form of dysosmia that refers to a usually very unpleasant odour triggered by any or specific environmental odour.