G6PD deficiency is an inherited shortage of glucose-6-phosphate dehydrogenase, a protein that helps protect red blood cells.
G6PD stands for glucose-6-phosphate dehydrogenase. It is an enzyme, a protein that helps chemical processes happen in cells, and it helps red blood cells cope with stress. In G6PD deficiency, certain exposures can trigger haemolysis, which means red blood cells break down too quickly. This can cause haemolytic anaemia, where too few red blood cells remain because they are destroyed faster than the body can replace them.
No. A G6PD activity test measures how active the enzyme is in a blood sample. The result can support assessment of the inherited condition, but the disease name describes the person’s underlying enzyme deficiency and clinical context, not just one laboratory number.

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