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Vitamin B12 Deficiency: Signs, Causes and Who Is at Risk
Common signs of vitamin B12 deficiency, why it happens, who is more at risk, and why a blood test, not symptoms alone, is needed to confirm it.
3 min read
Health topic
Vitamins and Nutritional Deficiencies
Vitamins and minerals support everything from energy to nerve function. Here we explain common deficiencies such as vitamin B12, iron and vitamin D, who is more at risk, and which foods provide them.
Deficiencies are diagnosed with blood tests, not symptoms alone. Our guides help you recognise when it is worth asking for a test; they do not replace one.
What this topic covers
Vitamin B12
Why B12 matters, signs of deficiency and who is at higher risk.
Iron
Iron-rich foods and the link with tiredness and anaemia.
Vitamin D
Sunlight, food sources and seasonal considerations.
Supplements
When supplements help, when they don't, and safety with medicines.
Vitamins guides
Videos on vitamins
All videosVitaminsShort
3 Signs of Vitamin B12 Deficiency You Shouldn’t Ignore
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