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References to Research & Scientific Studies on RLT and Weight Loss

1. A review of Low-Level Laser Therapy as a weight-loss measure.

Title Low-Level Laser Therapy for Fat Layer Reduction: A Comprehensive Review
Conducted by Pinar Avci, MD, Theodore T. Nyame, MD, Gaurav K. Gupta, MD, Ph.D., Magesh Sadasivam, MTech, and Michael R. Hamblin
Published onJune 7th,2007
JournalLasers in Surgery and Medicine
Number of participantsNone

Method of study:

The review first begins with a history of laser light therapy. The principle working behind the technology and highlighting its effectiveness as a treatment for weight loss. The review also touches upon researches done on the subject in the past.


The review concludes that while studies were previously done on the subject point to the safety and efficacy of LLLT in fat layer reduction, studies demonstrating the efficacy of LLLT as a stand-alone procedure are still woefully inadequate. More research on the subject is needed before human testing.

2. A controlled trial demonstrating the use of light therapy as a weight-loss treatment.

Title The potential of phototherapy to reduce body fat, insulin resistance, and “metabolic inflexibility” related to obesity in women undergoing weight loss treatment.
Conducted byMarcela Sene-Fiorese , Fernanda Oliveira Duarte , Antonio Eduardo de Aquino Junior , Raquel Munhoz da Silveira Campos , Deborah Cristina Landi Masquio , Lian Tock , Ana Claudia Garcia de Oliveira Duarte , Ana Raimunda Dâmaso ,
Published onFeb 2012
JournalLasers in Surgery and Medicine
Number of participantsSixty-four(BMI 30-40 kg/m2, age between 20 and 40 years old) 

Method of study:

The study was carried out by choosing 64 obese women and each woman was placed in two groups. The two groups were Exercise Training plus SHAM group and Exercise Training plus Phototherapy group. The sham group and the phototherapy group were both required to exercise but only the phototherapy group received the light therapy.


The results of the trial were mostly positive. The trials concluded that physical training plus phototherapy was more effective than physical training in reducing the delta of the percentage of fat mass. The exact results are given below:

 (%; -5.60 ± 1.59 vs. -4.33 ± 1.5; P < 0.04); fat mass (kg; -11.26 ± 2.82 vs. -5.80 ± 2.82; P < 0.0002); HOMA-IR index (-38.08 ± 9.23 vs. -20.91 ± 14.42; P < 0.0001). In addition, the trails observed an increase in delta (%) of total skeletal muscle mass (kg; 0.60 ± 1.09 vs. -1.38 ± 1.70; P < 0.003), adiponectin concentration (ng/ml; 1.08 (0.04-3.62) vs. -0.42 (-3.15 to 2.26); P < 0.03) in the same comparison. 

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