Antioxidant capacities of some food plants wildly grown in ayvalik of Turkey

This study aims to investigate the total antioxidant capacity (TAC) as trolox equivalent (mmol g^-1) of nineteen edible wild plants traditionally used in Ayvalik using four different assays, CUPRAC, ABTS, FRAP and Folin. The order of ten plants exhibiting the higher capacities could be listed as: Daucus carota (1^st wrt CUPRAC, ABTS, and FRAP), Sonchus oleraceus (2^nd wrt CUPRAC, ABTS, and FRAP), Sonchus asper (3 ^rd), Rumex pulcher (4^th wrt CUPRAC, ABTS, and Folin), Cichorium intybus (5^th wrt CUPRAC, ABTS, and Folin), Papaver rhoeas (7^th wrt CUPRAC, ABTS, and FRAP), Foeniculum vulgare (8^th wrt CUPRAC and FRAP), Urtica pilulifera (6^th wrt CUPRAC, 8 ^th wrt Folin), Rumex acetosella (7^th wrt Folin, 9th wrt CUPRAC and FRAP), and Nasturtium officinale (11^th wrt CUPRAC and Folin). The three edible wild plants (Daucus carota, Sonchus asper subsp. glaucescens and Sonchus oleraceus) with CUPRAC antioxidant capacities of 0.37±0.05, 0.31±0.03, and 0.34±0.05 mmol trolox g ^-1 respectively, may be considered as a potential source of natural antioxidants to be incorporated in current diets to protect human health. CUPRAC method proved to be most effective among electron-transfer based TAC assays since it responded to a wide variety of hydrophilic and lipophilic antioxidants.