Effects and functions of alum Effects of alum: eliminate phlegm, dry dampness, stop diarrhea, stop bleeding, detoxify, and kill insects. Purify water and generate AL(OH)3 in water to absorb impurities in water. achieve the purpose of water purification. Functions of alum: Indications: Treat epilepsy, laryngeal obstruction, excessive phlegm and salivation, hepatitis, jaundice, yellow swelling, gastric and duodenal ulcers, uterine prolapse, leucorrhea, diarrhea, epistaxis, mouth and tongue sores, and hemorrhoids. Scabies, water, fire, insect wounds. Alum, also known as alum, is an extract of alum stone. Alum is cold in nature and sour in taste, and has a strong astringent effect. Traditional Chinese medicine believes that alum has the effects of detoxifying and killing insects, drying dampness and relieving itching, stopping bleeding and diarrhea, clearing away heat and eliminating phlegm. Research in recent years has confirmed that alum also has antibacterial and anti-trichomoniasis vaginal effects. Some traditional Chinese medicine practitioners use alum to treat diseases such as hyperlipidemia, duodenal ulcer, tuberculosis and hemoptysis. In addition, alum is also a traditional food improver and leavening agent, and is often used as an additive in the production of fried dough sticks, vermicelli, rice noodles and other foods. However, since the chemical component of alum is aluminum potassium sulfate, which contains aluminum ions, excessive intake will affect the body's absorption of iron, calcium and other ingredients, leading to osteoporosis, anemia, and even affecting the development of nerve cells. Therefore, some nutrition experts suggest that you should eat as few foods containing alum as possible. Alum is a traditional water purifier that has been widely used by people. In recent years, it has been discovered that the aluminum contained in alum is harmful to the human body. Long-term drinking of alum-purified water may cause Alzheimer's disease. It is no longer recommended to use alum as a water purifier. Related tips: Five kinds of boiled water should not be drunk: 1. Water that has been boiled on the stove overnight or for a long time; 2. Boiled water that has been in a thermos bottle for several days; 3. Residual boiling water that has been boiled repeatedly; 4. Boiled water boilers Boiling water that has been reboiled overnight or not; 5. Boiling water used for steaming rice and vegetables. The reason why this boiled water is not suitable for drinking is: If the boiled water is boiled for a long time, part of the water will turn into steam and run away. Some minerals and inorganic salts originally dissolved in the water, as well as some other chemical elements, will be reduced to a very toxic substance, such as sulfate. Nitrate ions, which can cause blood poisoning in the human body.