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). (2024). International Journal of Life Science and Agriculture Research , 3(07), 633-637. https://doi.org/10.55677/ijlsar/V03I7Y2024-20