Stretch mark study, 2005
Photobiology Laboratory of the Medical University of South Africa.
To assess the efficacy of Bi-Oil in improving the appearance of stretch marks.
Subjects: 20 female participants. Age of participants: 18 to 55. Stretch mark location: abdomen.
Single-blind (assessor), randomised and controlled. Paired study design allowing for intra-subject comparison. Subjects had bilateral abdominal stretch marks, enabling half-abdomen study design. Product applied twice daily for 12 weeks to the targeted area. Application performed under supervision at regular intervals. Assessments conducted at 0, 4, 8 and 12 weeks.
Bi-Oil improved the appearance of stretch marks in both objective and subjective assessments. 50% of subjects recorded an improvement in appearance at 8 weeks.