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.
Hospital-related tests found that the aluminum content in brain tissue of patients with Alzheimer's disease was 5-30 times higher than that of normal people. When the content of aluminum in human body exceeds 5 ~ 10 times that of normal people, it can inhibit the absorption of phosphorus in digestive tract, reduce the level of inorganic phosphorus in serum, and cause osteomalacia and joint pain. Drugs such as aluminum trichloride, aluminum hydroxide, alkyl aluminum and salts can cause toxic and side effects in a short time. It can be seen that people's long-term intake of aluminum will eventually endanger human health.
So, in our daily life, how can we prevent a large number of aluminum "invasion"?
Use aluminum cookware correctly. Because aluminum cookware is light, soft and easy to scratch, it can react slowly with sugar, salt, acid, alkali and wine. And spill more aluminum, thus increasing people's chances of ingesting aluminum. Therefore, salt, acid and alkali foods should not be kept in aluminum pot for too long. Don't use aluminum shovels, spoons and other appliances, because they will produce invisible aluminium scrap in the long-term scraping of cooking and serving, and these aluminium scrap will enter the human body with the entrance of food. Aluminum pot should use bamboo or non-toxic plastic spoons to hold rice. It is suggested that families with conditions should not use aluminum cookers, but all stainless steel cookers except iron pots and casseroles. Because stainless steel products have stable metal properties and are harmless to human body.
Don't eat food containing too much aluminum. Eat less or not eat oil cakes, fried dough sticks, cakes, bread and biscuits made with aluminum-containing food additives. Take eating fried dough sticks as an example. Each rod contains 65,438+00 mg of aluminum. If you eat two pills a day, you will consume 600mg of aluminum a month, which is 10 times that of normal people. The content of aluminum in tap water is very small, which meets the national health and safety standards and can be safely drunk.
Often eat brain-nourishing food and do fitness activities. On the one hand, you can eat more brain-strengthening foods such as walnuts, sesame seeds and mung beans; On the other hand, in order to prevent Alzheimer's disease, we should also strengthen brain exercise, read more books and newspapers, think more, often play chess, talk more with people, and participate in sports activities suitable for the elderly.
Although the human body contains some substances, when these substances have no effect on the human body, on the contrary, when the content of these substances in the human body is high, it will do harm to the human body. Because aluminum products are widely used in life, aluminum salts are widely used to purify water, and the aluminum content in human body is high. Here I just want to talk about the harm of aluminum to human body.
Aluminum is not an essential element for human body. When human body is short of aluminum, it will not bring any harm to human body. On the contrary, aluminum salts can cause human poisoning. As early as 1965, Crazo first discovered that there were neurofibrillary tangles in the brain of rabbits with aluminum poisoning, but it did not attract people's attention. It was not until 1973 that he pointed out that the aluminum content in the cerebral cortex of cats increased, causing obvious brain dysfunction, which awakened the world.
Aluminum is toxic to living things, especially to human body. Soluble aluminum compounds are toxic to most plants. Aluminum compounds dissolved in water in acidic soil make it difficult for ordinary crops to grow normally. Usually, when the dissolved aluminum reaches more than 10-20PPM, plants will show signs of aluminum poisoning. Aluminum in soil can combine with soluble phosphate to produce insoluble aluminum phosphate, which leads to the death of plants due to phosphorus deficiency. Aluminum can also dehydrate plant cell protoplasm, and then destroy it and die. Aluminum combines with pectin in the cell wall, which strengthens the cross-linking structure of pectin and prevents plants from absorbing water and nutrients. Aluminum is also closely related to mineral nutrition such as calcium and phosphorus in plants. It can inhibit the absorption and accumulation of calcium and phosphorus by ordinary plants, and also affect their absorption and accumulation of potassium, magnesium, iron, manganese, copper, zinc and other elements. Aluminum is also toxic to aquatic animals. When the PH value is about 5, it is deposited in the gill of fish in the form of aluminum hydroxide, which makes it difficult for oxygen to enter the blood, which makes the salt concentration in fish out of balance and leads to fish death. The toxic concentration of aluminum to aquatic animals is generally above 70 μ g/L. The increase of aluminum content in water will lead to the coagulation of a large number of organic substances, which will lead to the death of aquatic animals due to lack of nutrition. Aluminum will precipitate phosphorus, which seriously threatens the reproduction of aquatic animals.
Once aluminum salt enters the human body, it is first deposited in the brain, which may lead to brain damage and severe memory loss, which is a unique symptom of Alzheimer's disease. The researchers involved in this work said that experiments on mice showed that the aluminum content in their brains reached a measurable level only after they were given a glass of water treated with aluminum salt. The study of mice found that the trace aluminum mixed in drinking water entered the brain of mice and gradually accumulated there. Researchers' research on dementia patients found that the aluminum concentration in 30% neocortex area of the brain of such patients was above 4 μ g/g (dry weight), and the aluminum content in neuron nuclei of patients' brains was four times that of healthy people, and the highest aluminum content could reach 30 times. Researchers believe that if aluminum gradually accumulates in the brain over time, it will kill neurons and make people lose their memory. A scientist said: We have been drinking water purified by aluminum salt and eating food containing aluminum salt all our lives, so when we are very old, we have accumulated a lot of aluminum in our bodies. He pointed out that in the past 70 years, the incidence of Alzheimer's disease has generally increased around the world. He said that aluminum is also used as food emulsifier.
Aluminum can directly damage the activity of osteoblasts, thus inhibiting the matrix synthesis of bone. At the same time, the absorption of aluminum by the digestive system leads to an increase in urinary calcium excretion and insufficient calcium content in human body. Aluminum accumulates in the human body and plays a physiological role, which can also lead to encephalopathy, osteopathy, nephropathy and non-iron deficiency anemia.
There are three main ways to prevent the harm of aluminum: first, it is suggested that urban water supply companies should not use aluminum salts [such as potassium aluminum sulfate (KAI(SO4)2)] as water purification agents in line with the purpose of being responsible for themselves and the people; Second, try not to use aluminum products as cooking utensils; Third, eat less food containing more aluminum salt additives (such as fried dough sticks).