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    GlossaryHair Growth Cycle (hair growth phases)

    process where hair follicles undergo growth, transition, and rest phases

    The Hair Growth Cycle, also known as Hair Follicle Cycling, consists of three main phases: anagen (growth phase), catagen (transitional phase), and telogen (resting phase). During the anagen phase, hair actively grows from the follicle, which can last several years. The catagen phase is a short period where growth stops, and the hair follicle shrinks. Finally, in the telogen phase, the hair rests before eventually falling out, making way for new hair to begin the cycle again. Understanding these phases is crucial for diagnosing and treating hair loss conditions like alopecia.

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      The Biology of Hair Growth

      research The Biology of Hair Growth

      10 citations, January 2009 in “Elsevier eBooks”
      Hair growth is influenced by hormones and goes through different phases; androgens can both promote and inhibit hair growth depending on the body area.
      Drugs Affecting Hair Growth

      research Drugs Affecting Hair Growth

      January 1990
      Different hair growth phases affect how follicles respond to X-rays, and hormones like testosterone and dihydrotestosterone play a key role in baldness; transplanted hair can grow on bald scalp areas.
      The Hair Cycle And Its Regulation

      research The Hair Cycle And Its Regulation

      38 citations, October 1988 in “Clinics in Dermatology”
      Hormones, nutrition, and seasonal changes regulate hair growth cycles, with androgens extending growth phases and factors like aging and malnutrition affecting hair loss and thinning.

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