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    Glossary Free Testosterone

    unbound testosterone available for immediate use by tissues

    Free Testosterone refers to the fraction of testosterone in the bloodstream that is not bound to proteins like sex hormone-binding globulin (SHBG) or albumin. This unbound testosterone is biologically active and readily available for tissues to use, playing a crucial role in various bodily functions such as muscle growth, mood regulation, and sexual health.

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    Research 10 of 1000+

    1. Triglycerides, independent of Ferriman Gallwey Score, is a main determinant of free testosterone index in PCOS F1000Research · 2019 · 6 citations
    2. The Diagnostic Value of Free Androgen Index in Obese Adolescent Females with Idiopathic Hirsutism and Polycystic Ovary Syndrome Journal of Academic Research in Medicine · 2021 · 5 citations
    3. Is it Necessary to Measure Free Testosterone to Assess Hyperandrogenemia in Women? The Role of Calculated Free and Bioavailable Testosterone Experimental and Clinical Endocrinology & Diabetes · 2006 · 22 citations
    4. Reduction in the Free Androgen Index in Overweight Women After Sixty Days of a Low Glycemic Diet Experimental and clinical endocrinology & diabetes · 2024
    5. Free Androgen Index (FAI): Marker of Premature Androgenetic Alopecia in Men Journal of Microbial & Biochemical Technology · 2016 · 1 citations
    6. EXPRESS: Free androgen index and its relation with female pattern hair loss Journal of Investigative Medicine · 2025
    7. Effects of hyperandrogenism and high body mass index on acne severity in women. PubMed · 2014 · 11 citations
    8. Correlation of cutaneous manifestations with body mass index, blood glucose, and hormonal levels in patients with polycystic ovarian disease Indian Dermatology Online Journal · 2020 · 3 citations
    9. Evaluating Testosterone and Dehydroepiandrosterone Sulfate (DHEA-S) as Biomarkers for Male Androgenetic Alopecia East African Scholars Journal of Medical Sciences · 2025
    10. Serum testosterone levels and clinical signs of hypogonadism in men with type 2 diabetes International Journal of Community Medicine and Public Health · 2021
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    Community 10 of 133

    1. Ultimate DHT/finasteride microdosing graph to replace the commonly one referenced on forums Reddit · 2 Dec 2020
    2. Help interpreting pre-fin bloodwork Reddit · 13 Jun 2021
    3. Just got some test results back. Reddit · 20 Jun 2020
    4. Very high free testosterone on dut… Reddit · 23 Feb 2026
    5. 13 Years Finasteride, Switched to Dutasteride - 25% increase in Total Testosterone (expected) but 150% increase in Free Testosterone? Reddit · 30 Sept 2025
    6. Does finasteride decrease free testosterone? Reddit · 27 Dec 2024
    7. Is it a lot of free testosterone? Reddit · 24 Sept 2024
    8. Thoughts on Pre-Finasteride Bloodwork? Normal/high Total and Free Testosterone, Low DHEA-S? Reddit · 8 Jul 2022
    9. Very low free test from 3 months of finasteride? Reddit · 20 Jun 2025
    10. Hair regrow idea: High dose Testosterone + RU58841 Reddit · 3 May 2026
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