For several years, specialists have tried to evaluate the fundamental characteristics of human hair, such as its hair type, width, and color. Concerning hair shape and type, previous anthropological research on hair form has highlighted its variety within and between people's ethnic groupings. Numerous studies have identified three ethnic human subgroups: African, Asian, and Caucasian (PharmD,2007). Your hair type is determined by genetics and primarily based on your hairβs curl pattern. The amount of curl in your hair is determined by your hair follicle. The shape of your follicle determines whether your hair type: is straight, wavy, curly, frizzy, coily, woolly, or helical (PharmD,2007) this means the more round or asymmetrical your follicle is, the curlier your hair will be. People often change and alter their curl pattern by hormones or by using heat, treatments, and chemicals but those genetic trails will reassert each time your hair goes throughout its growth phase.
Hair structure can differ from fine, medium, and coarse. According to the World Trichology Society (WTS), some people's hair is finer than others. WTS states that as people age this could affect their hair fibers to get thinner and shorter.
Andre Walker, Oprah's hairstylist, developed a broad-spectrum hair classification system that categorizes different hair textures and classifies each hair type into four categories with additional subcategories. A hair type system in hair curl patterns ranges from one, which is straight, to four, which is curled. Each category contains subcategories depending on the thickness of the wave, curl, or coil (A to C).