What is Hair?
The hair root originates deep in the dermis and grows up through the scalp, where it is called a shaft. The health of our hair depends on a healthy scalp. Too much oil (sebum) and sweat on the scalp can clog the follicle and inhibit healthy hair growth. Too little oil can cause the scalp to be dry and flaky. Each hair cuticle is made up of keratin and moisture. Keratin is the same protein that forms the base of nails, teeth, and skin. Vitamin deficiencies, illness, chemical processes, product abuse, and overstyling are some of the factors that can cause weak, lifeless hair. The cortex makes up 90 percent of the weight of the hair strand. It gives hair texture, strength, elasticity, and color, and it contains melanin, or pigment. The rest of the strand is made up of the cuticle, the outermost layer, and the medulla, the lightweight, air-filled core
