sentence: in food it can be isolated from tea , capers ( 135 mg/100g ) , kale ( 26 mg/100g ) , dill ( 13 mg/100g ) , broccoli ( 6 mg/100g ) , witch-hazel , grapefruit , cabbage , beans , endive , leek , tomato , strawberries , grapes , brussels sprout , apple , and other plant sources .