Dian Nur Aisyah, Rahmat Hidayat and Bangkit Riska Permata 2026. Preparation Formulation Clay Mask From Butterfly Pea Flower Pollen (Clitoria Ternatea l.) And Yam Powder (Pachyrhizus Erosus l.) As a Natural Antioxidant. International Journal of Health Engineering and Technology. 4, 6 (Mar. 2026). DOI:https://doi.org/10.55227/ijhet.v4i6.559.