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Foot odor is a problem that many people have to deal with on a daily basis. The present study was
designed to evaluate the ethanolic extract of betel leaves as an ingredient in deodorizing foot spray product, and the formulation was developed as a prototype spray. The deodorizing activity over foot malodor was studied by GC-MS technique and olfactory method. The formula of developed spray for foot malodor treatment consists of 0.1 % betel leaf extract, 30 % aluminium chlorohydrate solution, 5 % propylene glycol, 2 % glycerin, 0.1 % butylhydroxyl anisole and 1 % concentrated paraben in purified water by weight. This formula had a good appearance, fast-drying, non-greasy and thin coating on the skin surface after application. The product exhibited anti-bacterial activity against Staphylococcus epidermidis ATCC12228 and Bacillus subtilis ATCC6633 with diameters of inhibition zone of 14.77 ± 0.21 mm and 14.0 ± 0.35 mm, respectively.
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