title: The Efficacy and Safety of 660 nm and 411 to 777 nm Light-Emitting Devices for Treating Wrinkles.
abstract: BACKGROUND
  Low-level light therapy (LLLT) using light-emitting diodes (LEDs) is considered to be helpful for skin regeneration and anti-inflammation.
  
  
  OBJECTIVE
  To evaluate the efficacy and safety of 2 types of LLLTs using 660 nm-emitting red LEDs and 411 to 777 nm-emitting white LEDs in the treatment of facial wrinkles.
  
  
  METHODS
  A prospective, randomized, double-blinded, comparative clinical trial involving 52 adult female subjects was performed. The faces of the subjects were irradiated daily with 5.17 J of red or white LEDs for 12 weeks.
  
  
  RESULTS
  In both groups treated with red and white LEDs, the wrinkle measurement from skin replica improved significantly from baseline at Week 12. The red LED group showed slightly better improvement, but there were no statistical differences. In assessments by blinded dermatologists, no significant differences were observed in both groups. In the global assessment of the subjects, the mean improvement score of the red LED group was higher than that of the white LED group.
  
  
  CONCLUSIONS
  Low-level light therapy using 660 nm LEDs or 411 to 777 nm LEDs significantly improved periocular wrinkles. Especially, 660 nm LEDs could be an effective and tolerable treatment option for wrinkles.
authors.affiliation: *Department of Dermatology, College of Medicine, Dankook University, Cheonan, Republic of Korea; †Department of Dermatology, Wellness Spa Skin Research Center, Dankook University Hospital, Cheonan, Republic of Korea; ‡Institute of Lifestyle Medicine, Yonsei Wonju College of Medicine, Wonju, Republic of Korea.
authors.forename: Chan Hee
authors.initials: CH
authors.lastname: Nam
authors.forename: Byung Cheol
authors.initials: BC
authors.lastname: Park
authors.forename: Myung Hwa
authors.initials: MH
authors.lastname: Kim
authors.forename: Eun Hee
authors.initials: EH
authors.lastname: Choi
authors.forename: Seung Phil
authors.initials: SP
authors.lastname: Hong
mesh_terms: D000328:Adult; D000368:Aged; D004311:Double-Blind Method; D004869:Equipment Safety; D005260:Female; D006801:Humans; D008027:Light; D028022:Low-Level Light Therapy / Q000295:instrumentation / Q000379:methods; D008875:Middle Aged; D017060:Patient Satisfaction; D011446:Prospective Studies; D012060:Rejuvenation; D015595:Skin Aging / Q000528:radiation effects*; D016896:Treatment Outcome