Aluminum is not a trace element needed by human body, but if the aluminum contained in food exceeds a certain standard, it will do harm to human body. Part of the source of aluminum in daily food comes from additives such as leavening agent (such as alum and sodium bicarbonate), and part comes from packaging materials. Some foods added with alum also produce aluminum. Only 65,438+00%-65,438+05% aluminum can be excreted, and most of it will accumulate in the body, which will combine with many important components of the human body, such as protein and enzymes, affecting many biochemical reactions in the body. Long-term intake will mainly damage brain function, and in severe cases, dementia may occur, especially in children with weak physical resistance, which may lead to developmental retardation and osteomalacia in children. And it will also be affected to some extent intellectually. Lead accumulation is easy to damage the nervous system.
Food is processed through metal pipes, which usually contain alloys of lead and tin. At high temperature, lead is easy to vaporize, and vaporized lead will pollute these snow cakes. Lead is a multi-affinity poison, which accumulates in human body and is difficult to discharge, and mainly damages nervous system, hematopoietic system, blood vessels and digestive system. The consumers of ice cream are mostly children, and their tolerance for lead harm is only half or even less than that of adults. In addition, the harm caused by lead is obvious, mainly manifested in some nervous system behaviors, such as low attention, poor memory, hyperactivity, loss of anger and so on. , or respiratory infection, anorexia, anemia, vomiting and other symptoms. Ice cream is recommended to eat less. Saccharin sodium reduces the absorption capacity of small intestine.
Saccharin sodium, commonly known as saccharin, is a chemical compound as a sugar substitute. It is a food additive rather than a food, and it has no nutritional value to human body except for causing a sweet taste. On the contrary, eating too much saccharin will affect the normal secretion of digestive enzymes in children's stomach, reduce the absorption capacity of small intestine and reduce appetite. Eating too much saccharin sodium can also cause harm to children's liver and nervous system. Therefore, the laws of developed countries such as the United States stipulate that when saccharin is used in food, it is necessary to indicate relevant warnings that may be harmful to health on the label. Artificial pigments affect mental development.
Snacks are children's favorite food, but many snacks add a lot of artificial raw materials and artificial pigments, which will cause harm to children and affect their healthy growth. Because children are in the period of growth and development, the function of internal organs is fragile, the nervous system is underdeveloped, and they are sensitive to chemicals, and they need a lot of high-quality nutrients such as protein and lipids, which cannot be provided by synthetic pigments in snow cakes. On the contrary, synthetic pigments themselves or their metabolites have certain toxicity. If you eat food containing synthetic pigments for a long time, it will affect the impulse conduction of the nervous system and stimulate the brain nerves, leading to irritability, emotional instability, inattention and excessive behavior. Eating snow cakes often leads to excessive aluminum intake.
According to the data of National Food Contamination Monitoring Network and the special monitoring of aluminum content in processed foods in recent years, 40% of children in China have exceeded the standard. Nutrition and food safety experts pointed out that the food with high aluminum content is mainly flour and its products.
If aluminum tools and containers are used in food production, aluminum will be introduced into food, and packaging or holding food with aluminum products will also lead to excessive aluminum content in food.
Why does ice cream contain aluminum easily? First, the baking powder for snow cakes may contain aluminum; Secondly, alum as a leavening agent is an aluminum-containing compound. Although aluminum-free leavening agent has been successfully studied, the cost of aluminum-free leavening agent is 3 to 4 times higher than that of aluminum-containing leavening agent. Therefore, many ice cream companies are still choosing to use aluminum-containing leavening agents.
Children are the main consumers of food such as ice cream and wafer biscuits. If the aluminum content of these ice creams exceeds the standard, it will definitely do harm to children's health. Studies have proved that long-term excessive intake of aluminum will have adverse effects on children's bone growth and intellectual development; Excessive intake of aluminum may lead to calcium loss, inhibit bone formation and cause osteomalacia. 1, choose a brand. Preferred brand-name products produced by well-known enterprises sold in large shopping malls and supermarkets.
2. Look at this sign. When buying prepackaged products, pay attention to the label identification of the products. Pay special attention to the production date of products when purchasing, and choose products within the shelf life, preferably newly produced products.
3. Most of the packaging bags of snow cakes are filled with inert gas to prevent oil from oxidative rancidity. If the package is found to be leaking, consumers should not buy it.
4. Try to buy sealed ice cream, because the quality of packaged ice cream is generally good, while the ice cream sold in bulk is prone to rancidity due to exposure to air, and the hygiene index exceeds the standard. Because ice cream generally has the characteristics of high fat, high calorie and high sugar, you should pay attention to the following points when eating:
1. Open the package and smell the product. There should be no pungent smell, no mildew in appearance and crisp taste.
2, it is not appropriate to eat too much for a long time. Long-term consumption of a large number of snow cakes will cause a large intake of oil and calories, which is easy to cause human fat accumulation.
3. For people who should not consume too much sugar or patients with hypertension, ice cream should be carefully selected.
Children are in the stage of physical development, so we should pay more attention to reasonable diet and balanced nutrition. If you eat a lot of ice cream before meals, it is easy to feel full and affect normal eating. Entrusted by the Ministry of Health, the Guide to Snack Consumption for Children and Adolescents in China was officially released. Snacks are divided into three recommended grades, and puffed food is classified as "restricted food" and can be eaten at most once a week.
The guide was jointly compiled by the Institute of Nutrition and Food Safety of China Center for Disease Control and Prevention and the Nutrition Society of China. Children's snacks are divided into three recommended levels: regular consumption, appropriate consumption and restricted consumption, and marked with pie charts. Children's favorite cotton candy, ice cream, chocolate pie, etc. Are included in the scope of "restricting consumption". Parents are advised to let their children eat less as much as possible, preferably not more than once a week.