Atlas One · Host Biology · Scale 03 — Molecular

Testosterone

19-carbon androgen from Leydig cells via CYP17A1; binds androgen receptor → spermatogenesis, muscle anabolism, bone density, and libido; 5α-reductase converts to DHT; aromatase to estradiol; hypogonadism causes osteoporosis; prostate cancer driven by testosterone-AR signaling.

Also known as: T, 17β-testosterone, total testosterone, free testosterone, androgen, male sex hormone, TRT, testosterone replacement therapy

Scale 03 — MolecularScale
draftStatus
2026-06-08Last Reviewed
This is an auto-generated stub page built from atlas entry frontmatter. A richer hand-crafted page is planned. See the atlas source for the full entry including detailed body sections.
testosterone

Testosterone

19-carbon androgen from Leydig cells via CYP17A1; binds androgen receptor → spermatogenesis, muscle anabolism, bone density, and libido; 5α-reductase converts to DHT; aromatase to estradiol; hypogonadism causes osteoporosis; prostate cancer driven by testosterone-AR signaling.