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Blended essential oil comprising rose, bergamot and patchouli (RBP) oils with the volume ratio of 6:3:1, respectively have been tested for various biological activities. The blended oil showed antimicrobial activity against Propionibacterium acnes and Staphylococcus epidermidis with minimum inhibitory concentration (MIC) of 0.003125 %v/v and 0.125 %v/v, respectively. For antioxidant, blended oil showed the half inhibitory concentration (IC 50 ) at 0.67 %v/v and 0.14 %v/v while tested with 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azinobis(3-ethylbenzothiazoline-6 sulphonic acid) (ATBS) assays, respectively. Blended oil also has anti-tyrosinase activity with 45±4.6%tyrosinase inhibition at 4 mg/mL concentration using modified dopachrome method. However it has no activity on anti-collagenase and anti-elastase.

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Antiacne-causing Bacteria, Antioxidant, Anti-Tyrosinase, Anti-Elastase and Anti-Collagenase Activities of Blend Essential Oil comprising Rose, Bergamot and Patchouli Oils