A context ratio comparing inflammation (hs-CRP) to iron storage (ferritin) to clarify results.
The hs-CRP to ferritin ratio is a calculated value, not a separate blood test. It compares high-sensitivity CRP, a marker of inflammation, with ferritin, which reflects iron stores but also rises with inflammation.
The formula is: hs-CRP ÷ ferritin, using the units reported by the lab.
Both CRP and ferritin can rise during inflammation, but they move on different timescales and for different reasons. Comparing them can help separate iron-related changes in ferritin from purely inflammatory ones, and the ratio has been explored in hyperinflammatory states.
This ratio is mainly a research and specialist tool. It is read as a relative pattern rather than against an established healthy range.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
There is no established healthy reference range for the hs-CRP to ferritin ratio. It is used in research and specialist settings as a relative marker, so it should be interpreted as a pattern with a clinician rather than against a fixed cutoff.
Both components are non-specific. CRP rises with any infection or injury, and ferritin rises with inflammation, liver disease and alcohol as well as with high iron stores, while falling with iron deficiency. Recent illness can move both, so the ratio must be read in context.
Read with its components, hs-CRP and ferritin, and alongside iron studies and a full blood count.
What does a higher or lower ratio mean? A higher ratio suggests inflammation may be affecting ferritin. A lower ratio suggests ferritin may reflect iron stores more directly.
Do I need to fast? No. Fasting does not meaningfully change hs-CRP or ferritin for this ratio.
What can affect the result? Recent illness, hard workouts, smoking, pregnancy, iron supplements, and anti-inflammatory medicines can shift values. Test when you feel well if possible.
How often should I test? Many people repeat testing after recovery from illness or after changing supplements or lifestyle. Your clinician can suggest a timeframe.
How long do results take? Results are usually ready in about 7 days.
What should I discuss with my clinician? Review symptoms, diet, supplements, and medicines. Ask whether to add an iron panel or repeat testing when you are well.
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