title: Tea tree oil gel for mild to moderate acne; a 12 week uncontrolled, open-label phase II pilot study.
abstract: BACKGROUND
  The efficacy, tolerability and acceptability of a tea tree oil gel (200 mg/g) and face wash (7 mg/g) were evaluated for the treatment of mild to moderate facial acne.
  
  
  METHODS
  In this open-label, uncontrolled phase II pilot study, participants applied tea tree oil products to the face twice daily for 12 weeks and were assessed after 4, 8 and 12 weeks. Efficacy was determined from total numbers of facial acne lesions and the investigator global assessment (IGA) score. Tolerability was evaluated by the frequency of adverse events and the mean tolerability score determined at each visit. Product acceptability was assessed via a questionnaire at the end of the study period.
  
  
  RESULTS
  Altogether 18 participants were enrolled, of whom 14 completed the study. Mean total lesion counts were 23.7 at baseline, 17.2 at 4, 15.1 at 8 and 10.7 at 12 weeks. Total lesion counts differed significantly over time by repeated measures anova (P < 0.0001). The mean IGA score was 2.4 at baseline, 2.2 at 4, 2.0 at 8 and 1.9 at 12 weeks, which also differed significantly over time (P = 0.0094). No serious adverse events occurred and minor local tolerability events were limited to peeling, dryness and scaling, all of which resolved without intervention.
  
  
  CONCLUSIONS
  This study shows that the use of the tea tree oil products significantly improved mild to moderate acne and that the products were well tolerated.
authors.affiliation: Department of General Medicine, St John of God Hospital, Perth, Western Australia, Australia.
authors.forename: Harsimran Kaur
authors.initials: HK
authors.lastname: Malhi
authors.affiliation: Department of Dermatology, Royal Perth Hospital, Perth, Western Australia, Australia.
authors.forename: Jenny
authors.initials: J
authors.lastname: Tu
authors.affiliation: PathWest Laboratory Medicine WA, Queen Elizabeth II Medical Centre, Perth, Western Australia, Australia.|School of Pathology and Laboratory Medicine (M504), University of Western Australia, Perth, Western Australia, Australia.
authors.forename: Thomas V
authors.initials: TV
authors.lastname: Riley
authors.affiliation: Department of Dermatology, Royal Perth Hospital, Perth, Western Australia, Australia.|Hollywood Medical Centre, Perth, Western Australia, Australia.
authors.forename: Sujith Prasad
authors.initials: SP
authors.lastname: Kumarasinghe
authors.affiliation: School of Pathology and Laboratory Medicine (M504), University of Western Australia, Perth, Western Australia, Australia.
authors.forename: Katherine A
authors.initials: KA
authors.lastname: Hammer
mesh_terms: D000152:Acne Vulgaris / Q000188:drug therapy*; D000293:Adolescent; D000328:Adult; D000891:Anti-Infective Agents, Local / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D005782:Gels; D006801:Humans; D008297:Male; D017060:Patient Satisfaction; D008517:Phytotherapy; D010865:Pilot Projects; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D020947:Tea Tree Oil / Q000009:adverse effects / Q000627:therapeutic use*; D055815:Young Adult
chemical_list: D000891:Anti-Infective Agents, Local; D005782:Gels; D020947:Tea Tree Oil
keywords: alternative treatment; essential oil; in vivo efficacy; propionibacterium; terpenes; topical therapy