{"id":1485,"date":"2026-09-02T13:53:33","date_gmt":"2026-09-02T20:53:33","guid":{"rendered":"https:\/\/www.ultalabtests.com\/blog\/?p=1485"},"modified":"2026-09-02T13:53:35","modified_gmt":"2026-09-02T20:53:35","slug":"benefits-of-psa-free-and-total-test-vs-psa-total-test-alone","status":"publish","type":"post","link":"https:\/\/www.ultalabtests.com\/blog\/mens-health\/prostate\/benefits-of-psa-free-and-total-test-vs-psa-total-test-alone\/","title":{"rendered":"Free PSA vs. Total PSA: Differences, Percent-Free PSA, and Next Steps"},"content":{"rendered":"\n
\"Blood
Total PSA combines free and protein-bound PSA. The free fraction can add context in selected settings, but neither measurement independently diagnoses cancer.<\/figcaption><\/figure>\n\n\n\n

Direct answer:<\/strong> Total PSA is the amount of prostate-specific antigen measured in blood in both protein-bound and unbound forms. Free PSA is the unbound fraction. Percent-free PSA is calculated from the free and total measurements and may add risk context for selected people with an elevated or borderline total PSA. A lower proportion is generally associated with greater concern in some studied settings, while a higher proportion may be more consistent with a benign explanation. Neither pattern diagnoses or excludes cancer, proves BPH, or independently determines MRI, biopsy, surveillance, or treatment. The result must be interpreted with the assay, prior results, prostate size, medicines, symptoms, examination, and overall risk.<\/p>\n\n\n\n

Part of the Ulta Lab Tests Knowledge Center<\/h2>\n\n\n\n