Trans fat, also known as trans fatty acid, is a kind of fatty acid with trans double bond. It comes from two sources:
1. Natural food
Mainly ruminants, such as beef, mutton, and milk and dairy products. Because there are a lot of bacteria in ruminants’ stomach that participate in the digestion process, they can ferment to produce trans fat.
According to the data, every 100 grams of fresh beef and mutton contains 0.40 grams of trans fat and 0.08 grams of liquid milk. In addition, according to the different dietary patterns of mothers, there will be more or less trans fat in breast milk.
2. Processed food
It mainly includes partially hydrogenated vegetable oil, refined vegetable oil and long time cooking at high oil temperature.
The partially hydrogenated vegetable oil is semi-solid at room temperature. It has the advantages of high temperature resistance, non deterioration, crispy taste and long-term preservation, so it is widely used in processed food.
In general, trans fatty acids are less in natural foods and mainly come from hydrogenated oils. All food label ingredients list marked with “hydrogenated vegetable oil”, “shortening” and “vegetable cream” What’s more, hydrogenated oil is not clearly indicated as peanut oil, rapeseed oil, palm oil, etc
Bread with high fat content: crisp bread, Danish bread, cream bread, etc.
Fried food: sesame, fried dough sticks, hamburgers, moon cakes, instant noodles, and some snacks, such as puffed food, potato chips, rice chips, etc.
High fat snacks: biscuits, puffs, crackers, pastry, egg yolk pie or strawberry pie, cream cake, cream sandwich cake, etc.
Food named after “zhizhimo” or “creamer”: coffee companion, pearl milk tea, etc.