Influence of pre-harvest red light irradiation on main phytochemicals and antioxidant activity of Chinese kale sprouts.

•Pre-harvest red light irradiation postponed the degradation of glucosinolates.•Pre-harvest red light irradiation significantly increased the vitamin C content.•Pre-harvest red light irradiation enhanced the accumulation of total phenolics.•Antioxidant activity was elevated by pre-harvest red light treatment.