Low-Level Laser Therapy and Hair Regrowth: An Evidence-Based Review

December 2015 in “ Lasers in Medical Science ”

Mina Zarei, Tongyu C. Wikramanayake, Leyre Falto‐Aizpurua, Lawrence A. Schachner, Joaquín J. Jiménez

low-level laser therapy LLLT alopecia male pattern hair loss female pattern hair loss hair regrowth FDA-cleared LLLT devices randomized controlled trials RCTs hair counts MPHL FPHL laser therapy hair loss hair growth FDA-approved laser devices clinical trials

Studysummary This review concluded that FDA-cleared low-level laser therapy devices are safe and effective for patients with male and female pattern hair loss who do not respond to or tolerate standard treatments.

Automatically generated from the study's abstract, not written by a person, and not a review of the full paper. Not medical advice or a treatment recommendation. Read the original study, and consult a qualified healthcare professional before changing treatment. Full disclaimer

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Research cited in this study

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research Efficacy of Low-Level Laser Therapy on Hair Regrowth in Dogs with Noninflammatory Alopecia: A Pilot Study

22 citations , September 2014 in “Veterinary Dermatology”

This study found that low-level laser therapy may have promising effects on hair regrowth in dogs with noninflammatory alopecia, with most animals showing improvement after treatment.

research The Growth of Human Scalp Hair in Females Using Visible Red Light Laser and LED Sources

81 citations , August 2014 in “Lasers in Surgery and Medicine”

This study found that low-level laser therapy significantly increased hair growth in women with androgenic alopecia, achieving a 37% greater increase in hair counts compared to placebo.

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 Study

research 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 Study

147 citations , January 2014 in “American Journal of Clinical Dermatology”

This study found that low-level laser treatment with the HairMax Lasercomb significantly increased terminal hair density in both men and women with pattern hair loss, with no serious adverse events reported.

research Lack of Response to Laser Comb in Spontaneous and Graft-Induced Alopecia Areata in C3H/HeJ Mice

13 citations , January 2014 in “Journal of Investigative Dermatology”

The laser comb did not improve hair regrowth in mice with alopecia areata.

research Use of Low-Level Laser Therapy as Monotherapy or Concomitant Therapy for Male and Female Androgenetic Alopecia

45 citations , January 2014 in “International Journal of Trichology”

This study found that low-level laser therapy may improve hair growth in patients with androgenetic alopecia, either as a standalone treatment or combined with minoxidil or finasteride, without reported adverse reactions.

research The Growth of Human Scalp Hair Mediated by Visible Red Light Laser and LED Sources in Males

117 citations , September 2013 in “Lasers in Surgery and Medicine”

This study found that low level laser therapy at 655 nm significantly increased hair counts in males with androgenetic alopecia.

research Low-Level Light Therapy for Androgenetic Alopecia: A 24-Week, Randomized, Double-Blind, Sham Device-Controlled Multicenter Trial

106 citations , April 2013 in “Dermatologic Surgery”

This study found that low-level light therapy significantly increased hair density and diameter in androgenetic alopecia patients compared to a sham device, suggesting it could be an effective treatment option.

research Low-Level Laser Treatment Accelerated Hair Regrowth in a Rat Model of Chemotherapy-Induced Alopecia

43 citations , June 2012 in “Lasers in Medical Science”

In a rat model of chemotherapy-induced alopecia, this study found that low-level laser treatment significantly accelerated hair regrowth without affecting the efficacy of chemotherapy.

research No Improvement in Male-Pattern Hair Loss Using Laser Hair-Comb Therapy: A 6-Month, Half-Head, Assessor-Blinded Investigation in Two Men

13 citations , October 2011 in “Clinical and Experimental Dermatology”

This study found no improvement in male-pattern hair loss after six months of using laser hair-comb therapy in two men.

research Narrow-Band Red LED Light Promotes Mouse Hair Growth Through Paracrine Growth Factors From Dermal Papilla

23 citations , September 2011 in “Journal of Dermatological Science”

This study explored the effects of a new narrow-band red LED light on hair growth in mice, showing potential benefits compared to existing laser therapies.

research Effects of the Lexington LaserComb on Hair Regrowth in the C3H/HeJ Mouse Model of Alopecia Areata

81 citations , July 2011 in “Lasers in Medical Science”

This study found that using a low-level laser comb led to hair regrowth in a mouse model of alopecia areata, while sham-treated mice showed no hair regrowth.

research Types of Hair Loss and Treatment Options, Including the Novel Low-Level Light Therapy and Its Proposed Mechanism

46 citations , September 2010 in “Southern Medical Journal”

This review discusses low-level light therapy for androgenetic alopecia and female pattern hair loss, noting minimal clinical evidence on its efficacy and the need for more controlled studies.

research Effect of Helium-Neon Laser Irradiation on Hair Follicle Growth Cycle of Swiss Albino Mice

36 citations , December 2009 in “Skin pharmacology and physiology”

In this study, helium-neon laser irradiation at approximately 1 J/cm² significantly increased the percentage of hair follicles in the anagen phase in both testosterone-treated and untreated mice, suggesting stimulation of hair growth.

research The Use of Low-Level Light for Hair Growth: Part I

90 citations , January 2009 in “Journal of cosmetic and laser therapy”

In this study, low-level laser therapy showed no statistically significant improvements in hair growth measures, despite some patients experiencing increases in terminal hairs and shaft diameter.

HairMax LaserComb Laser Phototherapy Device in the Treatment of Male Androgenetic Alopecia