Hair Strengthening Activity Of Rice Bran Oil And Synergistic Effect With Some Natural Hair Dyes On Hair Protection

Abstract

Ultrasound extracted Rice bran oil (RBO) from the Madagascan Makalioka variety contained 40.25% of oleic acid as the major compound and 34.36% of linoleic acid. Reverse HPLC revealed that 24-methylene cycloartanyl ferulate was the most dominant Oryzanol compound and β and γ-tocotrienols were the dominant tocols. Stretching test was chosen as the method for evaluating the protective effect of RBO and natural dyes. Afro, Caucasian and Asian natural hair types were used to perform the study. The natural dyes consisted of a mixture of Lawsonia inermis and Cassia obovata aqueous extracts. To simulate the daily coloring routine, hair shafts were immersed in the plant extracts during 12 hours. For the RBO treatment, hair rods were massaged for about 10 minutes with the oil until fully absorbed. A load equivalent to 75 g was applied to hair shafts until rupture and the maximum elongation was recorded. The hair shafts treated with RBO have shown greater elongation compared to the control: 0.35, 0.73 and 0.50cm respectively for Afro, Caucasian and Asian hair types. Combined with natural dyes, this difference in elongation varied from 0.51cm for the Afro type to 1.08 cm for the Caucasian type. Asian hair type has shown the maximum stretching ability and the Caucasian hair type has shown the most positive response to treatments.