The Jawline Is Built by Testosterone
Your jawline is the ultimate biological resume, written in bone and signed by testosterone.
HRTioOctober 6, 2025
Craniofacial Dimorphism
Meaning
The sexually differentiated characteristics of the skull and facial bone structure, which are largely determined by the influence of sex steroids, primarily testosterone and estrogen, during pubertal development. These hormonal effects result in distinct male and female facial morphologies, impacting jawline definition, brow ridge prominence, and overall skeletal robustness. Understanding this dimorphism is crucial in contexts related to hormonal transition or optimization.
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