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Tag: percent free PSA

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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July 20, 2026

Why Blood Biomarker Ratios Matter: A Body-System Guide to Lab Tests, Formulas, and Clinical Interpretation

How lab test ratios connect heart, metabolic, liver, kidney, immune, hormone, iron, and prostate health.

A laboratory result usually answers a straightforward question: How much of a substance is present? A biomarker ratio asks a second question: How does that result relate to another part of the same biological system? […]

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