hs-CRP / Albumin Ratio (CAR)

A combined score from hs-CRP and albumin that reflects your body’s overall inflammation balance.

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hs-CRP / Albumin Ratio (CAR)
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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

hs-CRP / Albumin Ratio (CAR)

?

Clinicians use the hs-CRP/Albumin Ratio to gauge overall inflammation and resilience, especially when hs-CRP or albumin alone are borderline or conflicting. It can help track recovery after illness or surgery and add context to cardiovascular or autoimmune risk discussions. Results may prompt looking for triggers, lifestyle changes, or repeat testing to confirm trends. You can test this marker with Aniva across Germany and Finland.

What is

hs-CRP / Albumin Ratio (CAR)

?

Clinicians use the hs-CRP/Albumin Ratio to gauge overall inflammation and resilience, especially when hs-CRP or albumin alone are borderline or conflicting. It can help track recovery after illness or surgery and add context to cardiovascular or autoimmune risk discussions. Results may prompt looking for triggers, lifestyle changes, or repeat testing to confirm trends. You can test this marker with Aniva across Germany and Finland.

What insights will i get from

hs-CRP / Albumin Ratio (CAR)

?

High: May reflect higher inflammatory burden or lower protein reserves. Can occur with infections, flares, obesity, smoking, or recent surgery/trauma. Consider retesting when well and keep timing consistent; discuss possible causes and next steps with your clinician.
Low: Generally suggests lower inflammation and adequate protein status. Hydration, medicines, and timing can shift results slightly. This marker is not guideline‑endorsed; no standardized cutoffs. Trends over time and your clinical context are most helpful.

Sample type & collection

  • Sample: Blood
  • Fasting: No
  • Best timing: Morning; when you are well (no acute illness)
  • Collection: In person at the lab; at-home where available
  • Typical volume: 1 mL
  • Analysis: Serum
  • Prep tips: Stay hydrated; avoid intense exercise and alcohol for 24 hours; take medicines as prescribed unless advised otherwise
  • Turnaround: 1–3 working days

hs-CRP / Albumin Ratio (CAR)

is best interpreted with:

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hs-CRP / Albumin Ratio (CAR)

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hs-CRP / Albumin Ratio (CAR)
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Limits & interferences with

hs-CRP / Albumin Ratio (CAR)

:

Common factors that can skew results include recent infection, fever, injury, or surgery (which can raise hs‑CRP). Strenuous exercise can transiently raise hs‑CRP. Smoking and obesity may elevate hs‑CRP, while statins, NSAIDs, and steroids can lower it. Hydration status affects albumin (dehydration may increase it; overhydration, pregnancy, or liver/kidney disease may lower it). Alcohol before testing and poor sample handling can also affect values.

Special situations: if you are pregnant, recently unwell, or living with significant liver, kidney, or autoimmune disease, confirm or time results with your clinician.

Questions about

hs-CRP / Albumin Ratio (CAR)

:

What do my CAR results mean? Higher values usually point to more inflammation or lower protein reserves. Lower values generally reflect less inflammation; context and trends are key.

Do I need to fast? No. A routine, well-hydrated sample taken when you feel well is best.

What can affect the result? Recent illness, strenuous exercise, smoking, steroids, NSAIDs, statins, pregnancy, hydration, and liver or kidney issues can change results.

How often should I test? If tracking inflammation or recovery, consider every 1–3 months, or as your clinician advises.

How long do results take? Most labs report results within 1–3 working days.

What should I discuss with my clinician? Share symptoms, recent infections, surgeries, medicines, and the trend of hs‑CRP, albumin, and CAR over time.

Sources:

  • MedlinePlus — C-reactive protein (CRP) test. (2023). https://medlineplus.gov/lab-tests/c-reactive-protein-crp-test/
  • MedlinePlus — Albumin Blood Test. (2023). https://medlineplus.gov/lab-tests/albumin-blood-test/
  • ARUP Consult — Acute Phase Reactants. (2024). https://arupconsult.com/content/acute-phase-reactants
  • ACC/AHA — 2019 Guideline on the Primary Prevention of Cardiovascular Disease. (2019). https://www.ahajournals.org/doi/10.1161/CIR.0000000000000678
  • NHS — C-reactive protein (CRP) test. (2023). https://www.nhs.uk/conditions/tests/crp-test/
Medical disclaimer: This content is for informational purposes only and is not medical advice. Always discuss results with a qualified healthcare professional.

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