Indirect-to-Direct Bilirubin Ratio (I/D)

Shows the balance of indirect versus direct bilirubin to add context to liver and bile flow.

Book your 
Indirect-to-Direct Bilirubin Ratio (I/D)
 test

Securely stored in EU

Cancel anytime

Test 100+ biomarkers

Only 1 blood draw

Less than 5 minutes waiting time. One
simple test at one of our 20+ locations.

Fast results

Get your lab reports within one week.
Accessible on our app and per PDF.

Health app

All your health records stored
in a single, convenient place.

Test Summary

Sample Type 
Blood
Required Blood
1 mL
Analysis Type
Serum
Collection method
In person at the lab; at-home where available

Why test

Indirect-to-Direct Bilirubin Ratio (I/D)

?

Clinicians consider this ratio when bilirubin is elevated or borderline to clarify the pattern. It helps suggest whether the change occurs before or after the liver processes bilirubin. This context can guide next steps, like checking liver enzymes, hemolysis markers, or imaging if needed. You can test this marker with Aniva across Germany and Finland.

What is

Indirect-to-Direct Bilirubin Ratio (I/D)

?

Clinicians consider this ratio when bilirubin is elevated or borderline to clarify the pattern. It helps suggest whether the change occurs before or after the liver processes bilirubin. This context can guide next steps, like checking liver enzymes, hemolysis markers, or imaging if needed. You can test this marker with Aniva across Germany and Finland.

What insights will i get from

Indirect-to-Direct Bilirubin Ratio (I/D)

?

High: Proportionally more indirect bilirubin. May be seen with fasting, hemolysis, or slower conjugation (such as Gilbert syndrome).
Low: Proportionally more direct bilirubin. May accompany cholestasis, bile duct blockage, or some liver cell injury. Review trends with other liver tests to narrow the cause. This ratio is not guideline-endorsed; no standardized cutoffs.

Sample type & collection

  • Sample: Blood
  • Fasting: No
  • Best timing: Morning preferred; use the same time for repeats
  • Collection: In person at the lab; at-home where available
  • Typical volume: 1 mL
  • Analysis: Serum
  • Prep tips: Stay hydrated; avoid heavy exercise and alcohol for 24 hours; protect sample from bright light
  • Turnaround: 1–3 business days

Indirect-to-Direct Bilirubin Ratio (I/D)

is best interpreted with:

Track your

Indirect-to-Direct Bilirubin Ratio (I/D)

with Aniva

From heart health to hormone balance – our comprehensive test panels detect early signs of over 1,000 diseases.
Book your 
Indirect-to-Direct Bilirubin Ratio (I/D)
 test

Limits & interferences with

Indirect-to-Direct Bilirubin Ratio (I/D)

:

Common factors such as recent fasting, dehydration, strenuous exercise, alcohol, and acute illness can shift the ratio. Some medicines (for example, rifampin, atazanavir, probenecid, and hormonal contraceptives) may change bilirubin handling. Sample handling matters: bright light can lower measured bilirubin, and hemolysis can affect results. Testing at a consistent time of day helps reduce normal variation.

Special situations (when to confirm or adjust): pregnancy, suspected Gilbert syndrome, or testing soon after an illness or new medication may warrant repeat testing or tailored interpretation.

Questions about

Indirect-to-Direct Bilirubin Ratio (I/D)

:

What does my result mean? A higher ratio means more indirect bilirubin; a lower ratio means more direct bilirubin. Context with other liver tests matters.

Do I need to fast for this test? No. Fasting is not required, but testing at the same time of day improves consistency.

What can affect the ratio? Medicines, supplements, alcohol, dehydration, illness, and strenuous exercise can shift results. Sample light exposure and hemolysis can also matter.

How often should I test this? Usually only when bilirubin is abnormal or symptoms appear, or to confirm a change. Follow your clinician’s advice.

How fast are results ready? Most labs report within 1–3 business days.

What should I discuss with my clinician? Share symptoms, medication and supplement lists, alcohol use, and past liver issues. Ask which follow-up tests are useful.

Sources:

  • MedlinePlus — Bilirubin Blood Test. (2023). https://medlineplus.gov/lab-tests/bilirubin-blood-test/
  • ARUP Consult — Hyperbilirubinemia and Jaundice Testing. (2024). https://arupconsult.com/content/hyperbilirubinemia-and-jaundice
  • AASLD — Evaluation of Abnormal Liver Chemistries. (2017). https://www.aasld.org/practice-guidelines/evaluation-abnormal-liver-chemistries
  • NIDDK — Liver Tests. (2023). https://www.niddk.nih.gov/health-information/diagnostic-tests/liver-tests
  • Mayo Clinic Laboratories — Bilirubin, Total and Direct, Serum. (2022). https://www.mayocliniclabs.com/test-catalog/overview/607339
Medical disclaimer: This content is for informational purposes only and is not medical advice. Always discuss results with a qualified healthcare professional.

Related biomarkers

Heart & Cholesterol

LDL Cholesterol

Learn more
Liver Function

Conjugated (Direct) Bilirubin

Learn more
Blood Health (CBC & Iron)

Basophils

Learn more
Blood Health (CBC & Iron)

Mean Platelet Volume (MPV)

Learn more
See all biomarkers

How Aniva works

1.

Comprehensive blood test (100+ biomarkers)

One simple draw, 100+ biomarkers. Done in minutes at one of our trusted partner practices.

2.

Receive results and action plan

Within a week, your results are translated into clear ranges and an action plan. Reviewed by clinicians and tailored to your goals.

3.

Concierge to support you along the journey

Your plan evolves with you. Access guidance anytime (daily questions, long-term strategies, and more) with both AI and real experts.
Normally €2,500 worth of care for €199/year.

The Aniva Membership

One yearly blood draw, 100+ biomarkers, and a complete plan to turn your results into lasting health.

One annual blood test (100+ biomarkers)

Clinician-reviewed insights

Personalized action plan

Access to our AI Concierge

Access to curated products

€199  /year

Join Beta

Securely stored in EU

GDPR compliant

Cancel anytime

63%

of members find
early risk factors for diabetes

44%

of members find
elevated heart disease risk

70%

of members slow
their speed of ageing

“With Aniva, it’s the first time I feel like someone's really looking at me, not just rushing through with generic advice.”
– Andrea from Germany

Your future self is waiting

Start building the healthiest decade of your life.

Join Beta