Comparison of Total Tannin Levels in Extracts of Pegagan Leaves (Centella asiatica), Alang-Alang Roots (Imperata cylindrica), and Neem Leaves (Azadirachta indica) Using The UV-Vis Spectrophotometric Method. JFM [Internet]. 2026 Oct. 30 [cited 2026 Nov. 1];9(1):564-71. Available from: https://ejournal.medistra.ac.id/index.php/JFM/article/view/3769