
How does porosity affect oil absorption in textured hair?
Hair porosity dictates oil absorption in textured strands, with open cuticles in high porosity hair readily taking in oils, while tightly closed cuticles in low porosity hair resist penetration.

What are hair’s core structural elements?
Hair's core structural elements are its follicle and shaft, composed of keratin protein organized into a cuticle, cortex, and medulla, held by various chemical bonds.