Dizziness and vitamin deficiency: what to know

A restricted diet, absorption problem, heavy bleeding or another illness can affect nutrients and contribute to tiredness, weakness, tingling or lightheadedness. Anaemia and iron deficiency anaemia may also cause dizziness, although they are not the same as every vitamin deficiency. Dehydration, heat exhaustion, low blood sugar, anxiety, an inner-ear balance problem or an irregular rhythm such as atrial fibrillation can produce similar sensations. Spinning after a particular head movement may fit benign paroxysmal positional vertigo. Because these causes overlap, dizziness alone cannot identify a vitamin problem.

Keep a record of meals, fluid intake, symptoms, medicines and supplements, including whether dizziness is spinning or a faint feeling. Eat and drink regularly if you can do so safely. Do not start high-dose vitamins or iron without advice; the right supplement depends on the suspected deficiency and test results. Book a clinician appointment if the symptom persists, returns often, or is paired with unusual tiredness, pale skin, numbness, balance changes, weight change or digestive symptoms. Sit down during an episode and avoid driving until steady.

Get emergency help for dizziness with one-sided weakness, facial drooping, new speech or vision difficulty, chest pain, severe breathlessness, fainting, confusion, a severe new headache or inability to walk. Seek prompt medical care for repeated vomiting, black or bloody stools, a rapid irregular heartbeat, or symptoms after a head injury.

Ask which blood tests could check blood count, iron and relevant nutrient levels, and whether any medicine or digestive condition could affect absorption. Ask whether your diet needs support and when a supplement should be stopped or reviewed.