Comparison Activity Test of Antioxidant of Water Extract Coffee Robusta (Coffea Canephora) and Water Extract Coffee Arabica (Coffea Arabica) With the Method DPPH (1,1-Difenil-2-Pikrilhidrazil). ijlsar 2024, 3 (07), 633-637. https://doi.org/10.55677/ijlsar/V03I7Y2024-20.