1. Unsaturated fatty acids are divided into ω-3 series and ω-6 series according to the position of double bonds, and then into monounsaturated fatty acids and polyunsaturated fatty acids according to the number of double bonds. So the classification of unsaturated fatty acids is simple and easy to understand. In daily life, it is also easy to know.
2. Some edible oils in daily life contain polyunsaturated fatty acids, which is an important basis for judging the value of vegetable oil. The higher unsaturated fatty acids in ω-6 series are soybean oil, corn oil and sunflower oil, while the higher unsaturated fatty acids in ω-3 series are linseed oil and perilla oil. Also, these unsaturated fatty acids are easily oxidized in the human body. At this time, you need to eat with vitamin E. Generally, the ratio of ω-6 series unsaturated fatty acids to ω-3 series unsaturated fatty acids should be 4-6 1, and the intake should not exceed 50% to 60% of the total fat intake.