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Low Level Laser Therapy

also LLLT

Red-light devices, such as caps, combs and helmets, used on the scalp

Low-level laser therapy (LLLT), cold laser therapy, or photobiomodulation (PBM) is a photochemical reaction-based medical treatment that applies low-level (low-power) lasers or light-emitting diodes (LEDs) to the surface of the body without damaging tissue. Proponents claim that this treatment stimulates healing, relieves pain, and enhances cell function. Sometimes termed as low-level red-light therapy (LLRL), its effects appear to be limited to a specific range of wavelengths. Its effectiveness is under investigation. Several such devices are cleared by the United States Food and Drug Administration (FDA). The therapy may be effective for conditions such as juvenile myopia, rheumatoid arthritis, and oral mucositis.

Information, not medical advice. Talk to a licensed doctor or pharmacist before starting or changing a treatment.

Research 10

  1. Low level laser therapy and hair regrowth: an evidence-based reviewLasers in Medical Science · 2015 · 92 citations
  2. Results of low‐level laser therapy in the treatment of hair growth: An Egyptian experienceDermatologic Therapy · 2021 · 14 citations
  3. Low‐level laser (light) therapy (LLLT) for treatment of hair lossLasers in Surgery and Medicine · 2013 · 283 citations
  4. Low-level laser therapy for the treatment of androgenetic alopecia in Thai men and women: a 24-week, randomized, double-blind, sham device-controlled trialLasers in Medical Science · 2018 · 101 citations
  5. A Critical Assessment of the Evidence for Low-Level Laser Therapy in the Treatment of Hair LossDermatologic Surgery · 2016 · 51 citations
  6. Efficacy and Safety of a Low-level Laser Device in the Treatment of Male and Female Pattern Hair Loss: A Multicenter, Randomized, Sham Device-controlled, Double-blind StudyAmerican Journal of Clinical Dermatology · 2014 · 233 citations
  7. Efficacy of low‐level laser therapy on hair regrowth in dogs with noninflammatory alopecia: a pilot studyVeterinary Dermatology · 2014 · 32 citations
  8. The growth of human scalp hair in females using visible red light laser and LED sourcesLasers in Surgery and Medicine · 2014 · 116 citations
  9. Examining the Safety and Efficacy of Low-Level Laser Therapy for Male and Female Pattern Hair Loss: A Review of the LiteratureSkin Appendage Disorders · 2020 · 43 citations
  10. The Effectiveness of Low-Level Light/Laser Therapy on Hair LossFacial plastic surgery & aesthetic medicine · 2021 · 27 citations
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Posts 20

  1. Best red light hair therapy device for someone already on min and fin? Looking to add LLLT to my stack.Reddit · 27 May 2026
  2. Why is LLLT being considered as scam?Reddit · 5 Sept 2023
  3. Help choosing the right LLLT capReddit · 16 Nov 2025
  4. LLLT for hair: You’re probably getting ripped off (low light laser therapy) PSAReddit · 3 Jul 2026
  5. How does low level laser therapy?Reddit · 4 Apr 2025
  6. New Study For LLLT > MinoxidilReddit · 28 Apr 2024
  7. Why such hate on LLLT or natural hair growth options?Reddit · 27 Feb 2022
  8. So, what is our stand on LLLT?Reddit · 13 Aug 2025
  9. Low Level Laser Therapy(LLLT)Reddit · 4 May 2021
  10. LLLT vs Minoxidil for Hair Loss Treatment: Which Works Better?Reddit · 16 May 2025
  11. LLLT- Has anyone had success with low level laser therapy caps?Reddit · 14 Apr 2024
  12. LLLT product recommendations (that don’t cost thousands of dollars)Reddit · 4 Apr 2025
  13. Shedding Light (Pun Intended) on Red Light Therapy and Low Level Light Therapy: LLLT Clinical Study (41 Patients: 22 Treatment, 19 Placebo) - Statistically Significant Increase in Hair Count and Density of +35%Reddit · 17 Oct 2024
  14. LLLT seems like it's at least a solid maintenance tool. Can also provide ok regrowth in AA and MPB. - PubmedReddit · 10 Nov 2017
  15. Recommended LLLT brand - looking for safe and reliable optionReddit · 2 Jan 2026
  16. Combining Microneedling with LLLTReddit · 17 Feb 2025
  17. The Hair Loss Show: Low Level Laser Therapy for hair loss.Reddit · 18 Jun 2020
  18. Low Level Laser TherapyReddit · 21 Jul 2020
  19. Has anyone had luck with low-level laser therapy (LLLT) devices?Reddit · 26 Jun 2018
  20. LLLT laser helmet Theradome not working?Reddit · 4 Dec 2022
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