kidney · CREA · Cr
Creatinine
A muscle-breakdown product cleared by the kidneys; used (with eGFR) to estimate kidney function. Affected by muscle mass and hydration.
This page is general wellness education, not medical advice. Your own lab’s reference range and your clinician’s interpretation always take precedence.
Typical reference range
| Group | General range |
|---|---|
| Men | 0.74 – 1.35 mg/dL |
| Women | 0.59 – 1.04 mg/dL |
Units: mg/dL. Ranges vary by lab and assay — read yours against the range printed on your own report.
What high Creatinine can mean
- Reduced kidney function
- Dehydration
- High muscle mass / creatine supplements
- High meat intake
What low Creatinine can mean
- Low muscle mass
- Pregnancy