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Editor's note: In recent years, the term "trans fatty acids" has appeared more and more frequently in our lives. What exactly is it in many foods, such as crispy biscuits, bread, egg yolk pie, French fries, and chips? Why do we need special attention?
Beijing CDC tips: to reduce trans fatty acid intake
1, what is trans fatty acids?
we usually say oil, in the form of fatty acid glycerides, fatty acids are divided into saturated fatty acids and unsaturated fatty acids. From the chemical structure, the natural unsaturated fatty acids mainly exist in the smooth structure, and under the influence of external conditions, the structure of unsaturated fatty acids can be changed from the smooth to the trans. Compared with shun, trans fatty acids are similar in nature to saturated fatty acids, but their melting point is higher, the thermal stability is better, when cooking can add to the crisp taste of food, is good for long-term preservation of food.
2, which words prompt trans fatty acids?
fatty acids of commonly used vegetable oils are shun fatty acids. Some hydrogenated vegetable oils produce trans fatty acids. For example, hydrogenated oils, margarines, and ghee all contain a certain amount of trans fatty acids. The trans fatty acid intake of chinese residents mainly comes from processed foods, such as margarine cake, milk tea with fat and so on.
3, trans fatty acids are harmful to health!
and abroad have shown that trans fatty acid intake is positively related to the occurrence of cancers such as cardiovascular disease, breast cancer and colon cancer.
, for example, ingesting trans fatty acids derived from hydrogenated vegetable oils increases the risk of coronary heart disease by 16%. According to the World Health Organization, trans fatty acid intake causes more than half a million coronary heart disease deaths worldwide each year. In addition, trans fatty acids can pass through the placenta, can also enter the milk, the metabolism of fatty acids interfere with thereby affecting the growth and development of infants.
4, how to limit the intake of trans fatty acids?
addition of trans fatty acids can add to the crisp taste of food, good for long-term preservation of food, baking, fried food, such as crispy biscuits, bread, egg yolk pie, French fries, chips, etc., often contain trans fatty acids.
limit trans fatty acid intake, we can first focus on the ingredients list of packaged foods. In the food ingredients list, if there are words "hydrogenated oil," "margarine," "margarine," "fat cream," "ghee" and so on, the food contains trans fatty acids are more likely.
, you can also pay attention to the amount of trans fatty acids indicated in the nutritional content table of packaged foods. The General Guidelines for Nutrition Labelling of Prepackaged Foods promulgated by the State stipulate that "the content of trans fats (acids) shall be indicated in the nutritional composition table".
Therefore, when choosing food, you can control the intake of trans fatty acids by carefully reading the food ingredients list and the nutritional composition table to avoid or reduce the choice of foods with high trans fatty acid content.
Some inappropriate cooking habits will also produce trans fatty acids, such as high temperature long-term heating, repeated frying, therefore, care should be taken to control the temperature and time of food heating, less or no frying method, but not the pursuit of food crisp taste, to avoid or reduce the production of trans fatty acids.
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