At present, most food industries have improved hydrogenation process to reduce or eliminate trans fatty acids. If you pay attention, you can see that the labels of famous brands or high-quality vegetable fat powder products on the domestic and foreign markets all indicate “trans fatty acid is zero”.
The main sources of trans fatty acids in food are processed foods, such as incomplete hydrogenated vegetable oil, vegetable oil refining process, high temperature and long-time cooking. In addition to processed foods, trans fatty acids are also present in natural foods. In 2013, the national food safety risk assessment center of China released the trans fatty acid dietary intake level and risk assessment of Chinese residents. According to the survey of the contribution rate of different foods in the diet of residents in Beijing and Guangzhou, the natural sources of trans fatty acids are mainly ruminant food, such as meat, fat, milk and dairy products of cattle and sheep. Although beef and mutton or milk contains trans fatty acids, they are still relatively high-quality food, so we should not stop eating because of the trans fatty acids. It is unrealistic and unnecessary to blindly pursue “zero intake” of trans fatty acids.
The intake of trans fatty acids is not high in China
In order to avoid the risk of excessive intake of trans fatty acids, the World Health Organization (who) recommended that the energy supply ratio of trans fatty acids should be less than 1% in 2003. Do we exceed that recommendation? According to the survey data of the national food safety risk assessment center, the energy supply ratio of trans fatty acids for both men and women in China is 0.2%. In 2011, in big cities such as Beijing and Guangzhou, the trans fatty acid energy supply ratio of residents was 0.3%.
Although most of us don’t eat a lot of trans fatty acids, according to the average energy supply ratio of trans fatty acids in different age groups in Beijing and Guangzhou, the intake level of trans fatty acids in low age groups is higher. The highest energy supply ratio of trans fatty acids was found in the 3-6-year-old group, reaching 0.34%; the highest average intake of trans fatty acids was 0.61 g / day in the 13-17-year-old group. This means that for some people, the risk of trans fatty acids is still present.
Generally speaking, the intake level of trans fatty acids in Chinese residents is not very high, but it is necessary to control the trans fatty acids in diet consciously. Consumers should also check food labels carefully when buying food. The common expressions of hydrogenated oil in the label ingredient list are hydrogenated vegetable oil, partially hydrogenated vegetable oil, hydrogenated palm oil, hydrogenated soybean oil, vegetable shortening, margarine, etc. Therefore, when purchasing packaged food, if the ingredients listed above are included in the ingredient list, they should pay more attention to the nutrition list on the label, and they can choose the food without trans fatty acid or with low content of trans fatty acid.