Maqui berry (Aristotelia chilensis) and the constituent delphinidin glycoside inhibit photoreceptor cell death induced by visible light

► Maqui berry extract (MBE) contains delphinidin glycosides as major ingredients. ► MBE and its constituent inhibit light-induced photoreceptor cell (661W) death. ► MBE and its constituent inhibit light-induced ROS production in 661W. ► MBE inhibit light-induced phosphorylation of p38 in 661W. ► MBE was much stronger than those of other berry extracts.