Aloe vera leaf extract by glycerin: tyrosinase enzyme inhibitor and cosmetic formulations
Keywords:
Aloe vera, Glycerin, Tyrosinase enzyme inhibitor, CosmeticsAbstract
Aloe vera is an economic plant of Prachuap Khiri Khan Province and a popular herb added to cosmetic formulas due to its skin-soothing properties. However, the high price of Aloe vera extract in the market makes high production costs for small and medium-sized community enterprises. This research developed a method for extracting fresh Aloe vera gel with glycerin. Various concentration of 20-80% glycerin solution was used for fresh Aloe vera gel extraction. The solution was dried, and the anti-tyrosinase enzyme efficacy was tasted. The fresh Aloe vera gel-glycerin extract showed a percentage of tyrosinase enzyme inhibition between 38.72- 42.05. The extract derived from 80% glycerin solution as solvent showed the highest level at 42.05% ± 1.35. In addition, when comparing the percentage of an anti-tyrosinase enzyme of the crude Aloe vera extract using the standard extraction method, it displayed the percentage of an anti-tyrosinase enzyme at 47.50 ± 1.98, which is similar to the extraction using glycerin. The data above developed an efficient and convenient method for fresh Aloe vera gel extraction. The fresh Aloe vera gel and 80% glycerin solution were blended (1:1) with a multi-purpose blender and filtrated with white fabric. The filtrated solution was used in cosmetic formulations. In this research, two cosmetic formulas, Aloe vera body spa (ABS) and Aloe vera hydrating gel (AHG), were developed using fresh Aloe vera gel-glycerin extract as an ingredient from 0-50 percent by weight in each recipe. After formulating, the compatibility of fresh Aloe vera gel-glycerin extract in cosmetic products was examined by observing the layer separation. It was found that the fresh Aloe vera gel-glycerin extract exhibited good compatibility with cosmetic product formulations. In addition, the stability test of cosmetic products was examined. Interestingly, products containing fresh Aloe vera gel-glycerin extract also showed good stability. The maximum amounts of fresh Aloe vera gel-glycerin extract added to both cosmetic formulations (ABS and AHG) were 5% and 10%, respectively.
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