Glucose-6-Phosphate Dehydrogenase
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Blood Test for Unexplained Fatigue and Anemia
Glucose-6-Phosphate Dehydrogenase Quantitative
- Pinpoint the cause of unexplained fatigue
- Reveal hidden enzyme deficiencies affecting your health
- Clarify why certain foods make you feel ill
$66
Example results
First results as soon as overnight*
90 day happiness guarantee
We stand behind our service
Prescription & fees included
Go directly to the lab, no extra fees
Easy to understand results
With friendly doctor's notes & guidance
Fast & convenient
Lab visit as quick as 10 mins in & out
90 day happiness guarantee
We stand behind our service
Prescription & fees included
Go directly to the lab, no extra fees
Easy to understand results
With friendly doctor's notes & guidance
Fast & convenient
Lab visit as quick as 10 mins in & out
What's this test for?
This test is ideal if you're experiencing unexplained fatigue, weakness, or episodes of anemia that seem triggered by certain foods, medications, or infections. It detects G-6-PD enzyme deficiency, the most common enzyme disorder worldwide, which can cause your red blood cells to break down when exposed to specific triggers. Many people use this test when they have a family history of G-6-PD deficiency, unexplained jaundice as a newborn, or notice symptoms after eating fava beans or taking certain medications.
How should I prepare for this test?
No special preparation is typically required for this test. You don't need to fast, and you can take your regular medications unless your doctor advises otherwise. However, if you've recently had a blood transfusion or are recovering from an acute hemolytic episode, inform your healthcare provider as this may affect the accuracy of the results. It's best to test when you're feeling well rather than during an active episode of anemia.
What's included in this test?
This test measures Glucose-6-Phosphate Dehydrogenase (G-6-PD), an essential enzyme that protects your red blood cells from damage. When this enzyme is deficient, certain triggers like specific foods (especially fava beans), medications (like some antibiotics and antimalarials), or infections can cause your red blood cells to break down rapidly, leading to anemia, fatigue, and jaundice. Understanding your G-6-PD levels helps you identify and avoid these triggers to prevent potentially serious complications.
What happens after I get my results?
You'll receive detailed doctor notes in simple language explaining your G-6-PD enzyme levels and whether you have a deficiency. These notes include personalized recommendations about which foods, medications, and substances to avoid if you're deficient, plus guidance on managing your condition in daily life. You'll also get the standard lab report and can track your enzyme levels over time using our trends feature, which is especially helpful if you're monitoring family members or managing triggers.
When will I get my results?
Most G-6-PD quantitative test results are available within 3-5 business days after your blood sample reaches the laboratory. You'll receive an email notification as soon as your results are ready to view in your secure online account. If your results indicate a deficiency, you'll have access to comprehensive doctor notes that explain what this means and what steps to take next.
Who should consider getting this test?
This test is important for anyone with a family history of G-6-PD deficiency, unexplained episodes of anemia, or jaundice that occurred as a newborn. It's particularly relevant for people of African, Mediterranean, Middle Eastern, or Southeast Asian descent, as the deficiency is more common in these populations. You should also consider this test if you've experienced adverse reactions to certain medications or foods, especially fava beans, or if you're planning pregnancy and want to understand hereditary health risks.
What symptoms indicate I may need this test?
Common symptoms that suggest G-6-PD deficiency include sudden fatigue or weakness after eating certain foods or taking medications, episodes of dark or tea-colored urine, yellowing of the skin or eyes (jaundice), rapid heartbeat, shortness of breath, or pale skin. Some people notice symptoms after eating fava beans, taking antimalarial drugs, or during infections. Newborns with G-6-PD deficiency often experience prolonged jaundice that's more severe than typical newborn jaundice.
How can I manage G-6-PD deficiency naturally?
If you have G-6-PD deficiency, the most important step is avoiding known triggers including fava beans, certain legumes, and specific medications like some antibiotics and antimalarials. Maintain a balanced diet rich in antioxidants from colorful fruits and vegetables, stay well-hydrated, and avoid exposure to mothballs and other chemical triggers. During infections or illness, rest adequately and consult your doctor before taking any new medications, as some can trigger red blood cell breakdown.
What is G-6-PD deficiency and why does it matter?
G-6-PD deficiency is a genetic condition where your body doesn't produce enough of an enzyme that protects red blood cells from damage caused by certain substances. This enzyme acts like a shield for your blood cells, and without it, exposure to specific foods, medications, or infections can cause red blood cells to break apart, leading to anemia. Understanding whether you have this deficiency is crucial because avoiding known triggers can prevent serious complications and help you live a completely normal, healthy life.
How often should I retest my G-6-PD levels?
G-6-PD deficiency is a genetic condition, so if you test positive for the deficiency, your status won't change and repeated testing isn't usually necessary. However, if your initial test was done during or shortly after an acute hemolytic episode or blood transfusion, your doctor may recommend retesting in 2-3 months for accuracy. If you tested normal but continue to experience unexplained anemia symptoms, discuss retesting with your healthcare provider to rule out other conditions.
How’s this work?
Long story short:
- In the test options, use the filters or search box to narrow your choices and find the test you want.
- If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
- Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
- If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
- When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
- Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
- You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
How do I know which test to get?
Just text or call us at 754-799-7833, email us at [email protected], and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Just reach out to us via text at 754-799-7833 or shoot us an email at [email protected]. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.
There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.
Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.
This policy applies to all insurance companies, including federal health insurance programs like Medicare.
If you have any questions, please text us at 754-799-7833 or email [email protected].
Can I cancel my order?
We get it – sometimes your needs change.
As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.
If you have any further questions, please text us at 754-799-7833 or email [email protected].
You can read more about our cancellation policy here.
How can I find a lab location near me?
Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.
If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
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Demo results
Glucose-6-Phosphate Dehydrogenase
6.2 U/g Hb
Demo results
Low
Optimal 8.8 - 13.4
High
6.2 U/g Hb
What this means
Your G-6-PD enzyme levels are below the normal range, indicating a deficiency. This means certain foods, medications, and infections can trigger your red blood cells to break down, causing anemia, fatigue, and other symptoms. Knowing this helps you avoid specific triggers and prevent future episodes.
Recommended actions
Avoid fava beans, certain legumes, and known trigger foods
Consult your doctor before taking new medications, especially antibiotics and antimalarials
Carry a list of medications and substances to avoid with you at all times
Inform family members about potential hereditary risk and consider genetic counseling
* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.
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Blood Test for Unexplained Fatigue and Anemia
- Pinpoint the cause of unexplained fatigue
- Reveal hidden enzyme deficiencies affecting your health
- Clarify why certain foods make you feel ill
$66
Example results
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