 The study found that the DPPHSA was the most reliable method for determining antioxidant capacity in Malaysian rainforest plants. The DPPHSA is more accurate than the AFARE PSA due to its lack of color interference and consistent reaction rate. Therefore, it is recommended that the DPPHSA should be used in preliminary screenings of extracts from Malaysian rainforests. This article was authored by Gary Clark, Kong Naiting, Kristoff Wirt and others.