Hemochromatosis Does Not Directly Cause Elevated CRP
Hereditary hemochromatosis itself does not cause elevated C-reactive protein (CRP) levels. The disease is characterized by iron overload affecting multiple organs, but chronic inflammation—as measured by CRP—is not a primary feature of the condition 1.
Key Evidence
Direct Research Findings
A study specifically examining this question measured pre-phlebotomy CRP and IL-6 levels in C282Y homozygotes and found no difference in inflammatory markers between those with high versus low iron stores 1. This directly demonstrates that the phenotypic expression of hemochromatosis is not appreciably affected by ongoing chronic inflammation.
Additional research in 35 hemochromatosis patients compared to controls showed no significant difference in high-sensitivity CRP levels (225.01 vs. 207.13 mg/L, p = 0.32) 2.
Important Nuance: The Reverse Relationship
While hemochromatosis doesn't cause elevated CRP, there is evidence for a reverse relationship: elevated ferritin (a marker of iron overload) may be genetically associated with low-grade inflammation 3. However, this represents iron's effect on inflammation, not hemochromatosis causing inflammation.
Clinical Implications
When You See Both Elevated Ferritin and CRP
If a patient presents with both elevated ferritin and elevated CRP, consider:
- CRP is an acute phase reactant that elevates ferritin independently of true iron overload 4, 5
- Alternative diagnoses causing inflammation (infection, malignancy, autoimmune disease, metabolic syndrome)
- Fatty liver disease and alcohol excess, which commonly elevate both ferritin and CRP 5
- Liver injury from any cause can increase ferritin as it's released from damaged hepatocytes 5
Diagnostic Approach
The established diagnostic criteria for hemochromatosis focus on:
- Transferrin saturation >55% (more specific than ferritin alone) 4
- Serum ferritin >200 µg/L (women) or >300 µg/L (men) 4
- HFE genetic testing for C282Y and H63D mutations 4, 5
CRP is not part of the diagnostic workup for hemochromatosis and should not be used to screen for or diagnose this condition.
Common Pitfall
Don't assume elevated ferritin alone indicates hemochromatosis when CRP is also elevated—this pattern more likely suggests an inflammatory condition elevating ferritin as an acute phase reactant rather than true iron overload 5.