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    Did you mean Follicular Unit Density?
    GlossaryFollicular Unit Density

    number of hair follicular units per square centimeter of scalp

    Follicular Unit Density (FUD) refers to the number of hair follicular units per square centimeter of scalp. Each follicular unit typically contains 1 to 4 hairs, and this measurement is crucial in hair transplantation to ensure a natural-looking result and optimal coverage.

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