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    GlossaryHair Structure

    composition and organization of a hair strand's layers

    Hair structure refers to the composition and organization of a hair strand, which consists of three main layers: the cuticle, cortex, and medulla. The cuticle is the outermost layer, made of overlapping cells that protect the inner layers. The cortex, which is the thickest layer, contains keratin and pigments that give hair its strength, elasticity, and color. The medulla, found in thicker hair types, is the innermost layer and may play a role in the hair's overall structure and function. Understanding hair structure is crucial for diagnosing and treating hair-related conditions.

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