If Goliath were cancer, then David would have to be the tiny black raspberry that rose to fame as the deep purple superstar of the berry world when Ohio State University (OSU) scientists discovered its powerful abilities to fight cancer. Dr. Gary D. Stoner, one of the world’s leading researchers of berries, and his team were studying the impact of ellagic acid on esophageal tumors and found that black raspberries carried higher levels than the other berry varieties they tested. They also identified anthocyanins, responsible for the berry’s dark color.