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Tag: free PSA

September 2, 2026

Free PSA vs. Total PSA: Differences, Percent-Free PSA, and Next Steps

Learn what free, bound, total, and percent-free PSA measure—and why the result adds context but never makes the diagnosis alone.

Direct answer: 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 […]

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September 1, 2026

PSA Levels Explained: Results, Causes and Next Steps

Understand what a PSA result can mean, what can change it, and how repeat testing and clinical follow-up may clarify an unexpected result.

Direct answer: Prostate-specific antigen (PSA) is a protein made by prostate cells. A PSA blood test can support an informed prostate-cancer screening decision, help evaluate certain prostate or urinary concerns, and monitor people after prostate-cancer […]

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August 11, 2026

Cancer Blood Tests and Tumor Markers: Uses, Limits, and Next Steps

How CBC, organ-function tests, PSA, CA-125, CEA, AFP, CA 19-9, and emerging liquid biopsies support cancer evaluation and monitoring—and why no blood test diagnoses cancer alone.

Cancer blood tests include routine blood counts and chemistry tests, selected tumor markers, protein studies, and specialized molecular assays. They can support risk discussions, symptom evaluation, pretreatment baselines, treatment-safety monitoring, response assessment, and follow-up. However, […]

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August 11, 2026

Men’s Health Blood Tests: Testosterone, SHBG, Estradiol, PSA, and Metabolic Risk

A patient-centered guide to total and free testosterone, SHBG, pituitary hormones, PSA, TRT monitoring, sexual health, prostate risk, and cardiometabolic health.

Men’s health blood tests can help evaluate testosterone status, pituitary-to-testis signaling, selected causes of sexual symptoms, prostate-related risk, treatment safety, and cardiometabolic health. The most useful starting test for suspected testosterone deficiency is usually a […]

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