How often should I check my hs-CRP?

Check it once to establish your baseline as part of your cardiovascular panel, then recheck four months after you have made a specific intervention targeting one of the four drivers. hs-CRP responds to lifestyle change within eight to twelve weeks; a four-month interval gives you concrete data on whether the intervention is working. If you are on statin therapy, recheck at the three-month mark: statins reduce hs-CRP by up to 37% independent of their LDL effect (the JUPITER mechanism), and the response is predictable and relatively rapid.

Annual monitoring is reasonable for men with hs-CRP below 1.0 mg/L who have addressed their risk factors. Quarterly monitoring is appropriate when hs-CRP is above 3.0 mg/L and active interventions are underway. There is no value in checking it monthly: the normal biological variability of hs-CRP means that short-interval readings reflect noise more than signal. Note that acute illness, injury, or major stress can transiently spike hs-CRP to 20–50 mg/L; any reading in this range during or immediately after illness should not be interpreted as a cardiovascular signal without confirmation after recovery. (Pearson et al., Circulation, 2003)

Cardiologist's calibrated position, Solid (1) for the monitoring interval. This is clinical standard for tracking inflammatory biomarker responses.

What to do: Never interpret a single elevated hs-CRP result during or within two weeks of acute illness as a cardiovascular signal. Two readings separated by four weeks, both above threshold, with no intervening illness, is the confirmation standard.

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