For urban people, eating fast food is a very common thing. It is not objective enough to say that the food provided by these fast food restaurants is not nutritious. For example, a hamburger is enough to supply 25% of an adult's daily needs of protein, iron, zinc, etc. However, for people who eat fast food out for a long time, the following problems should arouse vigilance, otherwise it will be harmful to the body.

(1) Eating too fast. Everyone who goes to a fast food restaurant wants to save time. In fact, when you wolf down your food, you may not feel full yet, but you have already eaten a lot of food. This way of eating is not good for your stomach and intestines, and is a taboo for people with stomach problems and obesity.

(2) Food contains high fat. In addition to being high in calories, fat also makes food delicious. In order to attract customers, the food in fast food restaurants, such as French fries and fried chicken, are full of oil. This type of food has a high content of saturated fatty acids, and eating too much of it can lead to an increase in blood lipids.

(3) The food contains too much salt. In order to make the food in fast food restaurants taste good, they are usually seasoned with sufficient ingredients. This type of food often contains too much salt, so patients with high blood pressure, kidney disease, etc. should eat less.

(4) Food contains too much sugar. Most of the food in fast food restaurants contains too much sugar, such as milkshakes, sweet drinks, soda, ice cream, etc., which all contain a lot of sugar. To avoid consuming too much sugar, diners are advised to opt for juice and milk.

In addition, the food in fast food restaurants may also lack food fiber (some fast food restaurants specializing in bread usually do not supply vegetables), vitamin B (the food in fast food restaurants will be destroyed due to the long heat preservation time. ), folic acid, vitamin C, calcium, etc.

In view of the above reasons, I believe that fast food is convenient and can be eaten occasionally, but it cannot be used as a source of nutrition.