Evidence-grounded hair science for 4A, 4B, and 4C coil structures. Master cuticle physics, porosity diagnostics, warm mist steam penetration, and the precise molecular order of liquid, oil, and cream sealing.
Why coily hair loses moisture 3x faster than straight textures, how to navigate the cuticle tortuosity factor, and how to maintain moisture equilibrium for 7 consecutive days without product buildup.
How tightly clamped cuticles resist water droplets, why the float test is flawed, and how thermal opening allows humectants to penetrate deep into the cortex.
Liquid-Oil-Cream vs Liquid-Gel-Oil. Why putting oil before cream seals out hydration on low-porosity strands, and when botanically derived gels create the ultimate cast.
Recognizing the limp, gummy stretch of water-damaged strands versus the brittle, snapping stiffness of keratin saturation, and how to execute the elasticity rebound test.