Comparative effects of gamma and electron beam irradiation on the antioxidant potential of Portuguese chestnuts (Castanea sativa Mill.)

► Portuguese chestnuts were treated with gamma and electron beam radiation. ► Irradiated samples preserved total phenolics content. ► Irradiated samples revealed higher antioxidant activity than control samples. ► 1 kGy (electron beam) and 3 kGy (gamma) were suitable for antioxidant potential.