free testosterone; assays; reference ranges

Hi all. Was wondering which is more "important". Free testosterone or total. I had my annual bloodwork done required by my provider in November of last year. Total testosterone was 1100 ng/dl. Free test was 20.8 pg/mL. E2 was 34 pg/mL. SHBG was 36 nmol/L. I was injecting IM. I switched...

High-quality disease biomarker tests are critical for the correct diagnosis and treatment of patients, accurate interpretation of research data, and effective use of research findings in health care. CDC’s Clinical Standardization Program (CDC CSP) assists researchers and laboratories with...

Only at Excel, are we gonna take you deep! Clinical Utility and Analytical Aspects of Direct Measurements of Free Hormones Using Mass Spectrometry-Based Methods (2022) Mark M. Kushnir, Heather A. Nelson, and Kelly Doyle Background The free hormone (FH) hypothesis states that hormone...