Understanding G6PD (Glucose-6-Phosphate Dehydrogenase): Normal vs Optimal Ranges

?What is G6PD (Glucose-6-Phosphate Dehydrogenase)?

G6PD is an enzyme that protects red blood cells from oxidative damage. A deficiency in this enzyme is a genetic condition that affects the enzyme's ability to shield cells from oxidative stress. G6PD deficiency can lead to hemolysis (destruction of red blood cells) when exposed to certain triggers such as infections, medications, or foods like fava beans.

!Why It Matters

G6PD deficiency is the most common enzymatic disorder of red blood cells worldwide, affecting hundreds of millions of people. Low or absent G6PD activity may suggest an increased risk of hemolytic episodes, which can cause anemia, jaundice, and in severe cases, organ damage. Identifying this condition is critical for avoiding triggering substances and managing health proactively.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• Jaundice (yellowing of skin and eyes)
• Dark urine
• Fatigue and weakness
• Shortness of breath
• Pallor and pale complexion

How to Improve Your Levels

• 1Avoid fava beans and fava bean products entirely
• 2Avoid medications known to trigger hemolysis (sulfonamides, aspirin, antimalarials, nitrofurantoin)
• 3Maintain good infection control and seek prompt treatment for infections
• 4Stay well-hydrated to support kidney function during potential hemolytic episodes
• 5Work with a healthcare provider to identify and eliminate personal trigger foods and medications
• 6Consider genetic counseling if planning pregnancy, as the condition is inherited

When to Test

G6PD testing is recommended for newborns in regions with high prevalence, individuals with a family history of G6PD deficiency, those experiencing unexplained jaundice or hemolytic anemia, and before prescribing medications known to trigger hemolysis. Testing may also be considered prior to travel to malaria-endemic regions if antimalarial prophylaxis is planned.

Related Biomarkers