G6PD Test: Understanding Glucose 6 Phosphate Dehydrogenase Levels
A glucose 6 phosphate dehydrogenase deficiency test measures G6PD enzyme activity in red blood cells. Normal levels are about 7.0–20.5 U/g Hb in adults. Low levels indicate G6P deficiency and risk of hemolytic anemia under oxidative stress. This g6pd test helps identify gp6d deficiency symptoms and prevent complications by avoiding triggers.
Contents
Result interpretation G6PD
What your result means based on common reference ranges
Normal G6PD levels indicate adequate enzyme protection and low risk of hemolytic anemia under oxidative stress.
Mildly elevated G6PD levels usually reflect increased reticulocytes during recovery from anemia or recent blood loss.
Severely elevated levels may occur in hematologic disorders like leukemia with high cell turnover and altered enzyme distribution.
Low G6PD levels confirm G6P deficiency, increasing risk of hemolysis triggered by drugs, infections, or oxidative stress.
🔬 Check your value G6PD
Enter your result and get a personalized interpretation
What is G6PD?
G6PD is an enzyme that protects red blood cells from oxidative damage during metabolic stress. In a blood test, G6PD activity reflects how well cells resist destruction caused by infections, medications, or certain foods. Low levels lead to hemolysis, contributing to anemia, jaundice, and increased bilirubin. The g6pdh test is essential in diagnosing inherited enzyme deficiencies and evaluating unexplained hemolytic anemia. It is especially relevant in patients with recurrent anemia episodes or drug sensitivity.
Reference ranges
Causes of abnormal values
Causes of low G6PD
- • Genetic mutation (X-linked) — primary cause of G6PD deficiency
- • Acute hemolytic episode — deficient cells already destroyed
- • Enzyme variants (Mediterranean, A-) — reduced activity levels
- • Certain medications — oxidative stress reduces measurable activity
Causes of high G6PD
- • Reticulocytosis — young red cells contain higher enzyme activity
- • Recovery from anemia — increased bone marrow response
- • Hyperthyroidism — elevated metabolic enzyme activity
- • Leukemia — abnormal blood cell turnover raises average levels
- • Chronic granulomatous disease — altered immune-related enzyme expression
G6PD in combination with other markers
Possible symptoms
- •Jaundice (yellow skin and eyes)
- •Dark or tea-colored urine
- •Fatigue and weakness
- •Shortness of breath
- •Rapid heart rate
When to see a doctor
Consult a doctor if G6PD levels fall below 60% of normal or symptoms like jaundice and dark urine appear. Seek evaluation after reactions to medications, infections, or foods such as fava beans.
What to do if abnormal
- Review medications and avoid oxidative drugs
- Eliminate fava beans from diet
- Treat infections promptly
- Inform doctors about G6PD deficiency
- Avoid naphthalene exposure (mothballs)
The information on this page is intended for general understanding of test results and does not replace medical consultation. Accurate interpretation requires considering other blood markers and individual factors.
Content is based on medical literature and used within the PulseBook analytical system.
Want to understand your full health picture?
PulseBook analyzes all your results together, remembers your history and answers questions 24/7
Try for free →Fast • Sign in with Google • Free