How to read your own blood test results

A plain-English guide to the numbers on your laboratory report.

Dr. Owen Bradshaw · 7/27/2026

Laboratory reports are written for clinicians, which is why they feel impenetrable.\n\n**Reference ranges** are not targets — they describe where 95% of a healthy population falls. A marginally abnormal value in isolation is often meaningless.\n\n**Trends beat snapshots.** A creatinine that has climbed steadily across three years matters more than one slightly high reading.\n\n**Context is everything.** Inflammatory markers rise with any infection. Liver enzymes rise after strenuous exercise. Always interpret results alongside how you actually feel.

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