This herb contains bitter compounds that decrease the thickness while increasing the production of mucosal fluids particularly in the digestive and respiratory systems, which may explain some of its beneficial effects for both digestion and the reproductive organs. It also contains astringent compounds that are antiseptic, dilate peripheral blood vessels, and shrink inflamed tissue. Blessed thistle is an excellent herbal source of potassium and sodium and has been used for dysmenorrhea, amenorrhea, arthritis, dysura, jaundice, fevers and respiratory allergies. Blessed Thistle is often used in teas for nursing mothers to help increase milk supply. It is known to increase circulation and treat hormone imbalance. It enhances memory by delivering oxygen to the brain and is supportive of the heart and lungs.