People who like to drink milk tea are no stranger to creamers. It is often said that there is no pure milk in the milk tea nowadays, and all of them are made of milk essence. The milk powder contains fat powder, and the fat powder contains trans fatty acid, which is harmful to health. So, are there trans fatty acids in the end of vegetable fat? Can’t trans fatty acids be touched at all?
Milk essence is a kind of substance instead of milk, its main component is vegetable fat powder. Vegetable fat powder was first used in coffee partner, its main components are plant fat, corn syrup and plant protein.
Fat powder is not equal to trans fatty acid
When it comes to the end of vegetable fat, people will think of trans fatty acids and even equate them with trans fatty acids. In fact, it is not the same as trans fatty acids. The raw material of vegetable fat powder contains hydrogenated vegetable oil.
Hydrogenated vegetable oil is made from vegetable oil through hydrogenation process. Hydrogenation of vegetable oil is an operation to improve food processing performance by hydrogenation on unsaturated bond to increase the melting point of oil. Liquid vegetable oil is not good in crisp effect, but after hydrogenation, it is semi-solid at room temperature, which can meet the requirements of technology and taste.
In addition, the chemical properties of hydrogenated vegetable oil are relatively stable, which can extend the shelf life, and the cost is lower than animal fats such as natural cream, so it is widely used in food industry.
Some trans fatty acids, if not completely trans hydrogenated, are formed. Therefore, due to the hydrogenation process, there may be trans fatty acids in the plant fat powder, but the vegetable fat powder itself is not trans fatty acid, so it is not accurate to simply regard the fat powder or milk essence as trans fatty acid.
Trans fatty acids can be produced only by incomplete hydrogenation of vegetable oil. If it is completely hydrogenated, trans fatty acids will not be produced, but saturated fat will be produced. Therefore, fully hydrogenated vegetable oils do not contain trans fatty acids.
Trans fatty acids are also found in natural foods
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 source of hydrogenated food, such as vegetable oil, is not completely hydrogenated during 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.