“…The DPPH test, a test widely used to measure the ability to donate hydrogen atoms [41], was applied to measure the antioxidant capacities of Mentha species extracted by diferent solvent systems; these include the ethanol extracts of M. longifolia, M. piperita [144], M. pulegium [73,99,141,144], M. spicata, and M. rotundifolia [96,144]; the methanol extracts from M. pulegium [68,69,143,145], M. longifolia [68,93], M. aquatica, M. arvensis, M. piperita, M. rotundifolia, and M. villosa [145]; the water extracts from M. pulegium [69,73,141]; and the acetonic extracts from peppermint [25] and M. spicata [146]. DPPH was also used to evaluate the antioxidant activity of the essential oils from M. aquatica [92], M. longifolia [6,68,92,93], M. spicata [6,46,51], M. pulegium [68,69,72,73], M. rotundifolia [89,147], and M. piperita [46,92,138,140].…”