Understanding Lab Tests for Glucose-6-Phosphate Dehydrogenase Deficiency (G6PD Deficiency)
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Glucose-6-Phosphate Dehydrogenase (G6PD) deficiency is a genetic disorder that affects red blood cells. This condition occurs when the body doesn't produce enough of the G6PD enzyme, which helps protect red blood cells from damage. A specific blood test is required to accurately diagnose this deficiency.
Recommended Test
Glucose-6-Phosphate Dehydrogenase Quantitative
This blood test directly measures the amount of G6PD enzyme activity in red blood cells. Since G6PD deficiency is a genetic disorder that results in reduced or absent enzyme production, this quantitative test can definitively confirm the diagnosis by detecting abnormally low enzyme levels.
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Why G6PD Testing is Important
People with G6PD deficiency may experience episodes of hemolytic anemia when exposed to certain triggers like specific medications, infections, or foods such as fava beans. Early diagnosis through testing is crucial for avoiding these triggers and preventing potentially serious complications.
Understanding Your Results
The test measures enzyme activity levels in your red blood cells. Low or absent G6PD activity confirms the deficiency. Once diagnosed, you can work with your healthcare provider to identify and avoid triggers that could cause hemolytic anemia episodes.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
