proDERM Institute for applied dermatological reserach, Hamberg, Germany, 2010
Objective: To assess the efficacy of Bio-Oil in improving the appearance of stretch marks.
Sample: 38 female participants of varying ethnicities and aged 18 to 65. Stretch mark causes: various (post pregnancy, weight gain or adolescent growth spurt). Stretch mark location: abdomen, thighs and hips.
Method: Double-blind, randomized and parallel group. Subjects had matching stretch marks or a stretch mark large enough to allow a half-half stretch mark application and intra-subject comparison. Product was applied twice daily for 8 weeks. No additional massage performed on the target area. Application performed under supervision at regular intervals. Assessment conducted at 0,2,4 and 8 weeks. Different Scar parameters as defined in the Patient and Observer Scar Assessment Scale (POSAS) were evaluated.
Result: Bio-Oil is efficacious in improving the appearance of stretch marks. A statisticaly significant result after only 2 weeks (day 15), evident in 95% of subjects. After 8 weeks (day 57) 100% of subjects showed an improvement, with the extent of the improvement more than double that at 2 weeks. A continuous improvement of POSAS over the duration of the study.
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