title: Effect of wax epilation before hair removal with a long-pulsed alexandrite laser: a pilot study.
abstract: BACKGROUND
  Recent reports indicate that laser hair removal is most effective on anagen hairs. However, no published trials have examined laser epilation after hair cycle synchronization.
  
  
  OBJECTIVE
  To evaluate the potential for enhanced laser hair removal after the induction of telogen hairs into anagen by wax epilation.
  
  
  METHODS
  We identified four 2.5-cm square areas with equivalent hair length and density on the backs of 13 dark-haired white men. To induce typically telogen hairs into anagen, two areas on each patient were wax epilated. Two weeks later, one waxed area and one unwaxed area were treated with a long-pulsed alexandrite laser. One month after laser treatment, a subjective comparison was made based on hair density, length, and thickness.
  
  
  RESULTS
  In 12 of 13 patients, lasered areas that had been pretreated with wax epilation were clearer of hair as compared with areas that had been pretreated by shaving (P=0.0034). No significant difference was noted between waxed and unwaxed control areas that had not been laser treated (P=1.0).
  
  
  CONCLUSIONS
  Wax epilation 2 weeks before laser hair removal improves cosmetic outcomes at 1 month. This effect may be secondary to the recruitment and heightened sensitivity of early anagen hairs.
authors.affiliation: Department of Dermatology, Hospital of the University of Pennsylvania, 3600 Spruce Street, 2 Maloney Building, Philadelphia, PA 19104, USA. michaellehrer@yahoo.com
authors.forename: Michael S
authors.initials: MS
authors.lastname: Lehrer
authors.forename: Glen H
authors.initials: GH
authors.lastname: Crawford
authors.forename: Joel M
authors.initials: JM
authors.lastname: Gelfand
authors.forename: James J
authors.initials: JJ
authors.lastname: Leyden
authors.forename: Carmela C
authors.initials: CC
authors.lastname: Vittorio
mesh_terms: D000328:Adult; D001608:Beryllium; D018859:Hair Follicle / Q000502:physiology; D006204:Hair Removal / Q000379:methods*; D006801:Humans; D053685:Laser Therapy; D010865:Pilot Projects
chemical_list: C112654:alexandrite; D001608:Beryllium