Andriani, B.Y. et al. 2026. Determination of Total Flavonoid Content of Ashitaba (Angelica keiskei Koidz.) Leaf Extract Using UV-Vis Spectrophotometry. THRIVE Health Science Journal. 3, 1 (Mar. 2026), 19–24. DOI:https://doi.org/10.56566/thrive.v3i1.646.