Where can one find information on the normal PSA levels by age?

American Urological Association (AUA)

* PSA Screening and Early Detection of Prostate Cancer

* Section on PSA Levels by Age

* [Link](https://www.auanet.org/guidelines/prostate-cancer/psa-screening-and-early-detection)

American Cancer Society (ACS)

* Prostate Cancer Early Detection (PDQ®)

* Section on PSA Tests

* [Link](https://www.cancer.gov/types/prostate/psa-fact-sheet)

National Cancer Institute (NCI)

* Prostate-Specific Antigen (PSA) Test

* Section on PSA Levels

* [Link](https://www.cancer.gov/types/prostate/psa-test)

Mayo Clinic

* PSA Test: What to Know Before You Get One

* Section on PSA Levels by Age

* [Link](https://www.mayoclinic.org/diseases-conditions/prostate-cancer/in-depth/psa-test/art-20045446)

WebMD

* PSA Levels by Age

* Section on PSA Levels by Age

* [Link](https://www.webmd.com/prostate-cancer/psa-levels-age)

Healthline

* Prostate-Specific Antigen (PSA) Test: What You Need to Know

* Section on PSA Levels by Age

* [Link](https://www.healthline.com/health/psa-test)

Medical News Today

* PSA Test for Prostate Cancer: What It Is and How It Helps

* Section on PSA Levels by Age

* [Link](https://www.medicalnewstoday.com/articles/318780#psa-levels)