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    GlossaryFollicular Units (FUs)

    naturally occurring groups of one to four hair follicles

    Follicular units are naturally occurring groups of one to four hair follicles that grow together in the scalp. These units also include sebaceous (oil) glands, nerves, a small muscle, and occasional fine vellus hairs. In hair transplantation, follicular units are used as the basic building blocks to ensure a natural-looking hair restoration.

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