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. doi:10.55677/ijlsar/V03I7Y2024-20