– Natural Laxative: sorrel is a plant rich in anthraquinone, an active principle which in high doses has strong laxative effect. The plant should be used in moderation, because high doses can be purgative. It causes rapid evacuation of liquid stool, because of its cathartic properties (it accelerates defecation).
Along with the fruit, calyces, and flowers, the leaves of red sorrel are also edible. They have a rhubarblike taste and are served in salads and curries. The seeds likewise may be eaten; they are best roasted or ground to make flour for baking.