Health LibraryDiseases & ConditionsAnemia: Types, Causes, and When to Investigate
Diseases & Conditions

Anemia: Types, Causes, and When to Investigate

Low haemoglobin is common — but the cause matters more than the number.

Medically reviewed
Updated 2026

Common types

Iron-deficiency (most common globally), vitamin B12/folate deficiency, and anemia of chronic disease.

Investigation

A full workup helps identify the cause — treatment differs entirely depending on the type.

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