Sheep Sorrel Sheep Sorrel provides oxygen to tissue at the cellular level. It also provides strong immune support. Sheep sorrel has a long history of traditional use as an astringent, diuretic and laxative.

At least ten Native tribes of Canada and the United States have used this plant, also known as sour grass or sour weed, as a food and medicine. Sheep sorrel is a popular ingredient of many folk remedies and the tea was used traditionally as a diuretic and to address fevers, inflammation and scurvy. Sheep sorrel was considered the most active herb in Essiac for stimulating cellular regeneration, detoxification and cleansing, based on reports by Rene Caisse and her doctor colleague who did studies with mice bearing abnormal growths on the original eight herb formula.

Interestingly, even though it is not a legume, sheep sorrel contains significant levels of phytoestrogens with notable estrogen receptor binding activity, similar to the isoflavone phytoestrogens common to red clover, licorice and soy, all legumes known for their strong health restorative properties. The herb also contains several anthraquinones that are effective antioxidants and radical scavengers. Although research is limited on sheep sorrel, closely related species contain a powerful antibacterial compound called rumicin.

The high tannin content of the tea can also provide astringent action, which is useful for treating diarrhea and excessive menstrual bleeding. At low doses, most Rumex species are useful for treating diarrhea; however, at higher doses, they are laxatives due to the presence of anthraquinones that directly effect the neuromuscular tissue, stimulate peristalsis, increase the mucous production of colonic mucosa cells and stimulate secretion of water into the intestinal lumen, thereby exerting a laxative effect.