Experts pointed out that flour and flour products are the main sources of dietary aluminum in China. Due to the high consumption of pasta in the northern region, 60% residents' aluminum intake exceeds the standard.
Fan Zhihong, an associate professor at the College of Food Science of China Agricultural University, pointed out that the aluminum content of natural foods is generally low. The intake of aluminum in human food mainly comes from food additives containing aluminum, namely potassium alum (potassium aluminum sulfate) and ammonium alum (ammonium aluminum sulfate).
Alum can improve the taste of food. "According to the traditional process, alum should be added to fried foods such as fried dough sticks, fried oil cakes and fried shrimp slices. Alum can produce carbon dioxide and make pasta expand when heated. Some studies have found that in order to achieve the best expansion effect, the amount of alum added will far exceed the safe amount. "
In addition to fried dough sticks and oil cakes, many merchants also use something called baking powder when making cakes, steamed buns, cakes, tortillas and many soft and porous cakes and snacks. Fan Zhihong pointed out that the main components of this baking powder are sodium bicarbonate and alum.
Extended data:
Harm of aluminum-containing food;
There is a correlation between Alzheimer's disease and aluminum intake, but it is not clear whether there is a causal relationship. But aluminum will have some influence on children's bone development. As early as 1988, the World Health Organization managed aluminum as a food pollutant.
20 1 1 In June, the Joint Expert Committee on Food Additives of the United Nations Food and Agriculture Organization and the World Health Organization determined that the "provisional tolerable intake per week" of aluminum was 2 mg per kilogram of body weight per week, which was equivalent to a 60 kg adult eating 120 mg of aluminum per week.
However, the aluminum intake of many people in China has exceeded this target. The monitoring results show that the aluminum content of 40% foods in China exceeds the national standard, and about 1/3 individuals' safe intake of aluminum per week exceeds 2mg/kg body weight, among which children aged 4-6 exceed the standard most, and the amount exceeding the standard is 2-6 times that of adults.
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