other · PSA
Prostate-Specific Antigen
A protein made by the prostate, used as a screening and monitoring marker in people with a prostate. Levels rise with age and benign prostate enlargement as well as other conditions, so a single value is interpreted in context and often with age-specific cutoffs.
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 | Commonly < 4 ng/mL; age-specific cutoffs are often used |
Units: ng/mL. Ranges vary by lab and assay — read yours against the range printed on your own report.
What high Prostate-Specific Antigen can mean
- Benign prostate enlargement (BPH)
- Prostatitis / infection
- Recent ejaculation or exam
- Aging
- Prostate cancer
What low Prostate-Specific Antigen can mean
- 5-alpha-reductase inhibitors (e.g. finasteride)
- Generally not concerning when low