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. 2026;9(1):564-571. doi:10.35451/jfm.v9i1.3769