“…Knot formation due to intertwined hair fibers makes combing difficult and predisposes the African hair to breakage during normal grooming. In addition, the African hair has a slower hair growth rate compared with Caucasian and Asian hair, and there is a reduced total hair density [5,6,8,9,10,11,12,13,14,15,16]. As a result, African descent hair is more prone to develop knots, longitudinal fissures and splits along the hair shaft compared with the hair of Caucasian and Asian populations [17].…”