The safety and scientific validity of each study registered on the ANZCTR is the responsibility of the study sponsor and investigators. Listing a study on the ANZCTR does not mean it has been endorsed by the ANZCTR. Before participating in a study, talk to your health care provider and refer to information for consumers

Number of records retrieved: 1

Page: 1 

Trial from ANZCTR

The effects of Tea Tree oil on acne

  • Recruitment status at the time of last update
  • What is the status of the ethics application?
    Ethics status: Approved
  • Prospective – trial registered prior to recruitment of first participant.

    Retrospective – trial registered after recruitment of first participant.
    Retrospectively registered
  • Has the trial been updated in the last 12 months?
    Up to date
    (Last updated: 21/9/2011)
  • Ethics status: Approved
    What is the status of the ethics application?
  • Up to date
    Has the trial been updated in the last 6 months?
Key trial Information

Trial ID


Date registered

26 August 2005

Health condition

Acne vulgaris lesions

Recruitment countries


Recruitment status


Anticipated date of first participant enrolment

01 November 1999

Ethics application status


Brief summary

Potential subjects attended a screening clinic where they were assessed by the principal investigators. Those included were photographed (full face and left and right profile) and the film and frame numbers recorded in the subjectÿ¢ÿ¿ÿ¿s records. The study nurse, who was blinded throughout the study by the wearing of a rhino clip, then applied the active and placebo treatments to opposite sides of the face and forehead. Fresh gloves were worn during the application of each separate treatment.

In subsequent clinics a study nurse washed and dried the subjectÿ¢ÿ¿ÿ¿s face with a mild dermatological soap and recorded subjective opinions of perceived changes in acne. Four photographs were taken of each subjectÿ¢ÿ¿ÿ¿s face representing the upper and lower parts of each of the treated and placebo sides. Active and placebo treatments were applied as described above.

Subjects were photographed using a Minolta Dynax 600si camera with a Sigma 105mL macro lens, multi-directional studio flash lighting with soft boxes and Fuji Reala film. This film was used because it has high acutance and extended tunnel range. Colour was standardised against 18% grey card to ensure reproducibility. The camera was fixed to a tripod and the position marked on the floor to maintain consistency in future photography.

Subjects were collected and returned to their homes by a University car to maximise compliance.


Key inclusion criteria

Good general health aged

Minimum age

14 Years

Maximum age

18 Years


Both males and females

Key exclusion criteria

No exclusion criteria

Contact details and further information

Primary Sponsor

Type: Commercial sector/Industry
Name: Attori Pty Ltd
Country: Australia

Contact person for information and recruitment

Professor Stephen Myers
Australian Centre for Complementary Medicine Education and Research (ACCMER)
PO Box 157
Lismore NSW 2480
+61 2 66203403