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Hormone health

Prostate-Specific Antigen

Also known as: PSA test, Total PSA, Prostate-specific antigen blood test

The prostate-specific antigen (PSA) test measures the amount of PSA protein in your blood. PSA is made almost exclusively by prostate cells. While small amounts of PSA are typically present in your blood, higher PSA levels may reflect prostate enlargement, infection, inflammation, or sometimes cancer.

Depending on the results, your provider may recommend additional testing, like repeat testing, a digital rectal exam (DRE), an MRI, or — if indicated — a biopsy to further clarify the cause.

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Key takeaways

  • Sample required: Blood

  • Tests for: Prostate-specific antigen — a protein the prostate gland makes — to help assess prostate health and aid in prostate cancer screening.

  • Healthy range: There’s no universal ‘normal’ PSA level, but generally, PSA levels under 4.0 nanograms per milliliter (ng/mL) are in the expected range. Age, prostate size, and individual risk factors affect interpretation

What can a PSA test tell you?

A PSA test can provide insights into several health issues, including cancer screening, prostate health monitoring, and monitor for cancer recurrence after treatment.

  • Cancer screening. PSA is widely used to help detect prostate cancer early, though not all elevated results indicate cancer. Many men with elevated PSA have benign conditions, and some prostate cancers occur even with lower PSA levels.

  • Monitoring prostate health. Helps track benign conditions such as benign prostatic hyperplasia (BPH) or prostatitis (an issue marked by inflammation or infection). Rather than a single result, changes over time are often most useful.

  • Cancer follow-up. PSA is helpful for monitoring prostate cancer progression and detecting potential cancer recurrence after treatment.

The U.S. Preventive Services Task Force (USPSTF) emphasizes shared decision-making for men ages 55 to 69 about PSA-based screening. It’s important to weigh the risks and benefits, particularly because PSA screening may produce false positive results that could require additional testing and a possible prostate biopsy.

What is being tested?

PSA is a glycoprotein enzyme that the prostate epithelial cells produce. It helps liquefy semen, which aids in fertility. Small amounts of PSA normally leak into the bloodstream. PSA can rise when the prostate is:

  • Enlarged (BPH)

  • Inflamed (prostatitis)

  • Cancerous

Because PSA reflects overall prostate activity, a healthcare provider should interpret results in the context of age, symptoms, and exam findings. 

Where is the PSA test typically included?

PSA is not part of standard routine panels, though a provider may order it as part of a hormone panel. It’s usually requested for the following reasons:

  • For prostate cancer screening in at-risk men

  • To investigate urinary- or prostate-related symptoms, such as difficulty urinating, weak urine flow, or pelvic discomfort

  • To monitor known prostate conditions

  • To track recurrence or progression after prostate cancer treatment

Providers can order it as a stand-alone test or alongside other prostate evaluations (DRE, MRI, biopsy).

Who should get a PSA test?

Your provider may recommend PSA testing if you:

  • Are between 55 and 69 years old and want to discuss prostate cancer screening as part of shared decision-making with your provider.

  • Are younger than 55 but have a higher risk of cancer (African ancestry, or family history of prostate cancer)

  • Are being monitored for prostate cancer or BPH

Screening is not recommended for men ages 70+, since risks may outweigh benefits.

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Not available in all 50 states. Eligibility and provider order required. Lab results alone are not intended to diagnose, treat, or cure any condition. A provider will reach out about critical results and plans include access to 24/7 provider messaging.

Images for illustrative purposes only.

Frequently asked questions

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What causes changes in PSA levels?

Increased PSA levels may be related to prostate cancer, benign prostatic hyperplasia, prostatitis (inflammation or infection), urinary tract infections, or recent procedures, such as a prostate biopsy or catheterization. Other temporary PSA increases may occur with aging; recent ejaculation; prolonged cycling or vigorous exercise; prostate manipulation or procedures; and certain medications, including testosterone replacement therapy or other androgens.

Decreased PSA levels may be related to certain prostate surgeries and obesity (dilutional effect). Factors that can decrease PSA levels include 5-alpha-reductase inhibitor medications (including finasteride or dutasteride), some herbal supplements marketed for prostate health (e.g., saw palmetto), and possibly long-term use of NSAIDs, statins, or thiazide diuretics, though the latter associations are not fully established. 

Does a high PSA mean I have prostate cancer?

A high PSA doesn’t automatically mean cancer. Many noncancerous conditions (BPH, prostatitis) can raise your PSA level. Only further evaluation can determine the cause.

What’s the typical reference range for PSA levels?

There isn’t a single normal PSA for everyone. Many labs flag values ≥4.0 ng/mL, but age, race, prostate size, medications, infection, and recent procedures all affect results. As a rough guide, men with PSA between 4–10 ng/mL have about a 1 in 4 chance of having cancer, and those with >10 ng/mL have a risk above 50 percent. Your provider will interpret your number in context.

How often should I have my PSA checked?

For men who choose screening, typically every 1 to 2 years at least, depending on age, baseline level, and risk. 

What PSA level is dangerous?

There is no absolute “danger” threshold of PSA. Both the absolute level and how fast it rises matter. A PSA above 10 ng/mL is typically concerning, but aggressive cancers can also occur at lower levels.

Can women have a PSA test?

PSA is prostate-specific. Women generally do not produce PSA since they do not have a prostate. Trans women who still have a prostate may have PSA testing when clinically appropriate

Can I lower my PSA naturally?

There’s no proven way to lower PSA naturally. Lifestyle measures (maintaining a healthy weight and diet, and avoiding prostate irritation) support overall prostate health but don’t specifically reduce PSA.

What tests are related to this biomarker?

• Free PSA (ratio of free to total PSA)

• Digital rectal exam

• Prostate MRI

• Prostate biopsy

• Prostate health index (PHI)

The information provided here is for informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always talk to a qualified healthcare provider about your specific health concerns.

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Reviewed by Felix Gussone, MD

Published 11/19/2025