Purpose: This study aimed to find out if the purple sweet potato could be used as a natural hair dye. It tried to examine its effect by producing a hair texture improvement agent with purple sweet potato powder containing anthocyanin. Methods: A hair texture improvement agent using different concentrations of purple sweet potato powder like 0%, 6%, 9%, and 12% was produced. After applying the improvement agent to a bleached sample hair, it was heated and left in natural condition. Then, a

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... ative analysis between an experimental group and a control group was conducted. To understand the effect of hair dyeing, the values of Color-difference and the degree of fading were measured using a color difference scale. Also, to understand the dyeing effect on hair texture improvement, we measured the absorbance and luster using tensile strength and methylene blue. Results: The L * value in level 7 of the experimental group decreased when purple sweet potato concentration increased. The increase in a * and b * was not significant compared to the control group. Also, the ΔE * increase was not significant compared to the bleached hair. The experimental group in level 9 showed no fading on the third day. Further, the experimental group did not show significant tensile strength increase compared to the control group. Additionally, the experimental group showed an absorbance decrease in comparison with the control group. Finally, the experimental group's luster was significantly lower compared to the control group. Conclusions: The hair texture improvement agent produced with purple sweet potato powder did not show a significant effect on hair dyeing and hair texture improvement. More studies should be carried out before its probable commercialization.