ananda, ardini et al. 2026. Optimization of Lip balm Formulation Containing Beetroot Extract (Beta Vulgaris L.) With a Combination of Grapeseed oil and Avocado oil Using the Simplex Lattice Design Method. JURNAL KESEHATAN, SAINS, DAN TEKNOLOGI (JAKASAKTI). 4, 3 (Jan. 2026), 322–332. DOI:https://doi.org/10.36002/js.v4i3.4318.