Generally, the main raw materials of bottled salad we buy are vegetable oil, egg yolk and brewing vinegar, plus seasonings and spices. Among them, olive oil is mostly used as vegetable oil in Europe, while soybean salad oil is widely used in Asia. After the oil and egg yolk are fully stirred, emulsification occurs and it becomes a delicious salad dressing. A small amount of vinegar mainly plays an antibacterial role, so salad dressing generally contains no preservatives and can be regarded as a "green food".

2, salad dressing can also be homemade at home, the method is to take 500 grams of salad oil, egg yolk 1, put the egg yolk in a dry container, beat it with an egg beater until it bubbles, then add salad oil continuously and continue stirring, so that the oil and egg yolk are completely blended into a viscous state, and then add a proper amount of salt and sugar. The secret of making is that the oil must be added slowly, otherwise it will easily fail. In recent years, salads are favored by people because of their convenience in making and good taste. However, there are different views on the health effects of salad. Some people call salad "the best way to maintain nutrition". Some people also call salad dressing a "cardiovascular killer", which makes people wonder where to go. In fact, all these statements are reasonable and not comprehensive enough.

3. The main ingredients for making salad are mostly fresh fruits and vegetables, which not only preserves the freshness and nutrition of raw materials to the maximum extent, but also prevents the easily damaged nutrients from being oxidized in the air through the film formed on the surface of raw materials by salad sauce, so it is not an exaggeration to call salad "the best way to maintain nutrition". But at the same time, salad dressing is indeed a food with high calorie, high fat and high cholesterol, which is determined by its composition. According to statistics, each serving (15g) of salad dressing contains about 1.000 calories, which is twice as much as that of rice or white flour with the same weight, and the contents of fatty acids and cholesterol are also higher than that of ordinary food. Excessive consumption will indeed have a negative impact on the human cardiovascular system. How to solve this contradiction? First, we should control our intake, and don't add too much salad dressing or eat too much at a time. Another way is to try to choose salad dressing made of olive oil. Olive oil contains a lot of beneficial fatty acids, which can reduce blood fat and remove cholesterol from blood, and can largely solve the side effects of salad dressing, and also allow you to enjoy the unique fragrance of olives, but its price is also relatively high, which depends on your spending power.