Erythrocyte Sedimentation Rate

For men a typical normal ESR is roughly 0-22 mm/hr, and the upper limit rises with age (a common rule of thumb for men is age divided by 2). ESR (erythrocyte sedimentation rate) measures how fast red cells settle in a tube and is a nonspecific marker of inflammation. Reference limits vary by lab, age, and sex, so check the range on your own report.

Both flag inflammation, but ESR is an older, less specific and slower-moving test, while CRP responds within hours and falls quickly once inflammation resolves. ESR still has value in certain rheumatologic conditions and is sometimes used alongside CRP. For general inflammation monitoring, CRP is usually the more responsive and reliable of the two.

A raised ESR indicates inflammation somewhere in the body but does not say where, and it can climb with chronic inflammation, infection, autoimmune disease, and anemia. Because it is so nonspecific, it is interpreted in context and often paired with CRP and other tests. A persistently high ESR is a prompt for your physician to look for an underlying cause.

Yes, indirectly. Testosterone can raise hematocrit, and a higher red-cell concentration (polycythemia) artifactually lowers the ESR, which can mask real inflammation. For that reason CRP is generally the better inflammation marker in men on TRT with elevated hematocrit. Mention your TRT and any recent hematocrit readings when your physician interprets an ESR.