It has the efficacy of clearing the heart and removing heat, astringent essence, stopping bleeding, quenching thirst, etc. It can be used to treat heart failure, shock, impotence, heartburn, thirst, vomiting of blood, spermatorrhea, redness of the eyes, swelling and pain, etc. It can clear the fire of the heart, calm the fire of the liver, diarrhea the fire of the spleen, lower the fire of the lungs, eliminate summer heat and remove the annoyance, promote the production of fluids to quench thirst, and cure the eyes of redness and swelling. Drinking water with lotus seed core can cure constipation. It also clears the heart, removes heat, stops bleeding, and astringes the essence; cures heartburn, thirst, spitting blood, and tonifies the kidneys and fixes the essence. There are historical records that Emperor Qianlong always used lotus leaf dewdrops to concoct lotus seed core tea whenever he visited summer resorts to nourish the heart and benefit the intellect, adjust the vital energy, clear the heart fire and detoxification. Lotus seed is very rich in calcium, phosphorus and potassium, in addition to the composition of bones and teeth, but also to promote blood clotting, the activation of certain enzymes, to maintain nerve conductivity, sedation of the nerves, to maintain muscle contraction and heartbeat rhythm and so on. Abundant phosphorus is also the main component of the cell nucleus protein, help the body for protein, fat, sugar metabolism, and maintain the acid-base balance, the formation of sperm also has an important role. Lotus seed has the effect of nourishing the heart and tranquility. Middle-aged and elderly people, especially brain workers often eat, can be brain-healthy, enhance memory, improve work efficiency, and can prevent the occurrence of Alzheimer's disease. Lotus seed core is extremely bitter in taste, but has a significant cardiac effect, can dilate peripheral blood vessels, reduce blood pressure. Lotus core also has a very good effect of removing heart fire, can treat mouth and tongue sores, and help sleep.