Also known as alum, potassium alum, potassium aluminum alum and potassium alum.

Scientific name: potassium aluminum sulfate dodecahydrate

Molecular formula: kal (SO4) 2. 12h2o.

Obviously, this is an aluminum salt. Many scientists have found through research that Alzheimer's disease is closely related to aluminum. At the same time, it is also found that aluminum is harmful to the function and immune function of brain, heart, liver and kidney. It is reported that aluminum salt may cause memory loss. A private research team in Australia said: Excessive use of aluminum salt to purify water may lead to brain damage and severe memory loss, which is a unique symptom of Alzheimer's disease. The researchers' experiments on mice show that the trace aluminum mixed in drinking water enters the brain of mice and gradually accumulates there. After giving them a glass of water treated with aluminum salt, the aluminum content in their brains reached a measurable level. Therefore, the World Health Organization officially recognized aluminum as a food pollutant in 1989 and controlled it.

Judging from the current situation in China, a large amount of aluminum comes from food additives containing aluminum. Aluminum-containing food additives are often used in fried foods such as fritters and oil cakes. Baking powder, a food additive containing aluminum, is also commonly used in steamed buns, flower rolls, cakes and so on. According to the results of spot checks by relevant departments, the aluminum content per kilogram of oil cake exceeds 1000 mg. If you eat 50 g of this oil cake, it will exceed the aluminum intake allowed per person per day. Therefore, we should try to eat less fried food, use less leavening agent containing aluminum, and avoid using aluminum cookware and tableware. In addition, aluminum can also be ingested in drugs such as aluminum hydroxide, metoclopramide, atropine aluminum salt, nicotinic acid aluminum salt and aspirin. Due to the use of aluminum cookware and tableware, aluminum is dissolved in food and absorbed by about 4 mg.

According to the regulations of the World Health Organization, the daily intake of aluminum should not exceed 65,438+0 mg per kilogram of body weight. Under normal circumstances, a person's daily intake of aluminum will never exceed this amount. However, drinking water purified by aluminum salt, edible oil strips, vermicelli, bean jelly, oil cakes, canned soft drinks and other foods containing aluminum salt, or eating meals fried with aluminum cookers will increase people's intake of aluminum, thus affecting people's intake.

To sum up, it is safe to add alum within 1000 mg to one kilogram of vermicelli.