Why do French fries go with ketchup

French fries (English name French fries) is a kind of food made of potatoes, which are cut into strips and fried. It is one of the most common fast food now, and it is very popular all over the world. However, in the field of nutrition, nutritionists have been arguing about the existence of French fries. One of the most important reasons is that French fries contain a small amount of acrylamide after frying. Acrylamide, as a carcinogen, has certainly become the target of public criticism. Lycopene in tomato can inhibit the growth of bacteria, and it is an excellent antioxidant, which can scavenge free radicals in human body, and its anticancer effect is twice that of β-carotene.