Growth Inhibition and Transient Temperature Measurement of Laser-Irradiated Hair Fibers and Follicles

    January 2000 in “ Optics Letters ”
    Lawrence K. Iwaki, Todd A. Heimer, Edwin J. Heilweil, P. Manos
    Image of study
    TLDR Laser treatment can inhibit hair growth and different hair colors reach different temperatures when lasered.
    In 2000, researchers Iwaki, Heimer, Heilweil, and Manos studied the temperature changes, infrared images, and heat propagation kinetics of laser-irradiated hair fibers and live follicles. They used a cooled InSb focal plane array detector to measure these parameters. Their findings showed that pulsed irradiation of different colored hair follicles under controlled fluence conditions led to catagenic induction, with variations in the maximum temperature reached. Hair fibers rich in eumelanin (black/brown and dark brown) reached maximum infrared temperatures of 400K and 374K, respectively. In contrast, hair containing pheomelanin (blond, gray, and red fibers) yielded lower temperatures of 315K, 310K, and 301K, respectively. These maximum temperatures were observed at the end of 50 ms laser pulses, with emission decays lasting several hundred milliseconds.
    Discuss this study in the Community →

    Related Community Posts Join

    6 / 1000+ results

      community Creatine made all my high DHT symptoms return

      in Research/Science  78 upvotes 2 weeks ago
      Creatine may increase DHT levels, potentially causing symptoms like acne, oily hair, and hair shedding. Users report mixed experiences, with some avoiding creatine due to hair loss concerns and others seeing no impact.

      community Follow me on my laser hair growth journey.

      in Progress Pictures  37 upvotes 5 months ago
      A 34-year-old male documents his hair growth journey using the iRestore Elite laser cap, biotin, and Pure Synergy Organic Superfood Capsules, after unsuccessful hair transplant and previous treatments with minoxidil and finasteride. Replies suggest using finasteride or dutasteride instead and caution against excessive use of the laser cap.

      community Low Level Laser Cap has been effective for me

      in Technology 1 year ago
      A user reported positive hair growth using a regimen of oral finasteride, minoxidil, Dr. Pen, keto shampoo, and a Capillus 272 LLLT cap. Other users debated the effectiveness of the LLLT cap, with some attributing the success to the combined treatments rather than the cap alone.

      community Post Low-Level Laser Light Therapy Syndrome (PLLLTS )

      in Satire  6 upvotes 1 year ago
      Hair loss discussion includes LLLT treatments and a satirical condition called PLLLTS, causing patients to resemble lighthouses and attract moths. Some users express concern about others taking the satire seriously.

    Similar Research

    5 / 1000+ results