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    Glossary Hair Cortex

    thickest hair layer, providing strength, elasticity, and color

    The hair cortex is the thickest layer of a hair strand, located between the outer cuticle and the inner medulla. It contains long keratin filaments that give hair its strength, elasticity, and color, as it houses the pigment granules responsible for hair color. This layer is crucial for the hair's structural integrity and overall health.

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    1. KY19382 Experimental compound that activates hair-growth signals, tested only in animals
    2. Rosemary Herb whose oil is used in hair care
    3. Peppermint herb and oil thought to stimulate skin and hair
    4. Biotin B vitamin, often sold as a hair supplement
    5. Clascoterone Topical androgen-receptor blocker, approved as an acne cream