Braiding protects your hair by reducing friction and shielding the protective cuticle layer.

The human hair shaft is composed of three layers, with the outermost layer being the cuticle. This layer consists of overlapping dead cells that resemble shingles on a roof. When these scales lie flat, the hair remains shiny and hydrated. However, friction from rough fabrics or excessive brushing can lift these scales, leading to moisture loss and structural weakness.A study published in the Journal of Cosmetic Science highlights that mechanical stress is a leading cause of hair weathering. By braiding the hair, the surface area exposed to external friction is significantly reduced. This containment prevents individual strands from snagging on fibers or rubbing against each other, which preserves the integrity of the protein structure known as keratin.Braiding also helps distribute natural sebum from the scalp along the hair shaft more effectively than loose hair. This lipid barrier acts as a natural lubricant, further reducing the 'coefficient of friction' between strands. Dermatologists often recommend loose braids for sleep to prevent 'nocturnal hair breakage,' a common issue caused by tossing and turning against cotton sheets.Research conducted by the TRI Princeton institute has shown that repetitive combing of loose hair can lead to significant cuticle chipping over time. Braids serve as a protective style by minimizing the need for frequent detangling and heavy brushing. This simple mechanical intervention can extend the life cycle of hair strands and prevent the formation of trichoptilosis, commonly known as split ends.