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Diversification of products that are derived from essential oils carries important implications in reducing agricultural waste and promoting the medicinal materials industry. In this study, we formulated a shampoo and a body wash product incorporated with lemongrass ( Cymbopogon citratus ) essential oils (LEOs) and evaluated their color stability and the LEO compositional change. We first determined the color change and chemical composition of bare LEO under different storage conditions. Afterward, the washing product base was formulated, and its formulation process was optimized to minimize the color change by varying a wide range of parameters including pH, the inclusion of preservatives and antioxidants, LEO/antioxidant ratio, and emulsification temperature. The base product was then used in body wash and shampoo formulation following our previously reported procedure. The results indicated that direct incorporation of the LEO into the cosmetic products resulted in better color stability and citral retention in comparison with emulsion formation. In addition, shampoo and body wash products showed no detectible presence of compounds resulting from citral decomposition such as 3,7-dimethyl-1,3,6-octatriene,  p -mentha-1,5-dien-8-ol, and  p -cymene-8-ol. The current findings are expected to aid in diversifying LEO-derived commodities and justifying scalability of the cosmetics production process with a focus on the incorporation of naturally derived ingredients.

Color and composition of beauty products formulated with lemongrass essential oil: Cosmetics formulation with lemongrass essential oil