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References to Research & Scientific Studies on RLT and Hair Loss

1. A study of the efficacy of light therapy as a treatment for hair loss

TitleLow-level laser (light) therapy (LLLT) for treatment of hair loss 
Conducted byPinar Avci, Gaurav K Gupta, Jason Clark, Norbert Wikonkal, Michael R Hamblin
Published on February 2014
Journal Lasers in Surgery and Medicine
Number of participantsNone

Method of study:

This is a review styled research detailing the work previously done on the subject. The study references several studies done on the subject as well as providing a short completion of all the work done in the realms of light therapy and hair loss. It also explains the history the light therapy briefly.

Key finding:

The research paper references a good number of studies done previously on the subject. The commonality of all the previous studies on the subject paints a pretty compelling picture of the effectiveness of light therapy as a hair loss treatment. Further, the study also points out the relative safety of light therapy treatment.

2. A study on the effectiveness of low-level laser therapy as a hair loss treatment

TitleComparison of the effects of 665 nm low-level diode Laser Hat versus and a combination of 665 nm and 808nm low-level diode Laser Scanner of hair growth in androgenic alopecia
Conducted byBehrooz Barikbin, Zeinab Khodamrdi, Leila Kholoosi, Mohammad Reza Akhgri, Majid Haj Abbasi, Mojgan Hajabbasi, Zahra Razzaghi& Samaneh Akbarpour
Published on2nd August 2016
Journal  Journal of Cosmetic and Laser Therapy
Number of participants90 patients

Method of study:

90 patients of various ages and suffering from various degrees of hair loss were chosen for the trial. The 90 patients were divided into 3 groups. The first group of 30 patients received 655 nm red light using a laser hat, the second group of 30 patients received 655 nm red laser plus 808 nm infrared laser and the last group of 30 were the placebo group.

Key findings:

Those that received light therapy treatment experienced a significant amount of hair regrowth as compared to those that didn’t receive the light therapy treatment. The study also noted no side effects of the treatment. 

3. A study on light therapy and its positive effects on hair loss

TitleComparison of the effects of 665 nm low-level diode Laser Hat versus and a combination of 665 nm and 808nm low-level diode Laser Scanner of hair growth in androgenic alopecia.
Conducted byBehrooz Barikbin, Zeinab Khodamrdi, Leila Kholoosi, Mohammad Reza Akhgri, Majid Haj Abbasi, Mojgan Hajabbasi, Zahra Razzaghi& Samaneh Akbarpour
Published on17th May 2017
JournalJournal of Cosmetic and Laser Therapy 
Number of participants 90

Method of study: 

The 90 volunteers were put into 3 random groups. Each group had 30 volunteers. The first group was only exposed to 655nm of light using a laser hat, the second group received 655 nm red laser plus 808 nm infrared laser using a laser scanner, while the third group received no light therapy. 

Findings:

The groups who were exposed to light therapy had statistically significant improvements in hair growth. While participants in the laser scanner group had moderate to minute amount of hair growth.

4. A study on low-level light therapy for Androgenetic Alopecia (Hair Loss).

TitleLow-level light therapy for androgenetic alopecia: a 24-week, randomized, double-blind, sham device-controlled multicenter trial .
Conducted byHyojin Kim, Jee Woong Choi, Jun Young Kim, Jung Won Shin, Seok-Jong Lee, Chang-Hun Huh
Published onAug 2013
JournalDermatologic Surgery
Number of participants40

Method of study: 

The study was a 24-week, randomized, double-blind, sham device-controlled trial. The study consisted of 40 volunteers each suffering from AGA. 20 volunteers were provided with a helmet device to treat hair loss. The device emitted wavelengths of 630, 650, and 660 nm to combat hair loss. Each volunteer was instructed to use the device for 18 minutes daily. While the remaining 20 were given a placebo device.

Findings: 

The light therapy group show significantly greater air density as opposed to the placebo group. The mean hair diameter of the light group was also greater than that of the placebo group.

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