First of all, there is no problem in nutrition. Comparing the nutrition of sweet potato and rice flour, we will find that it is mainly starch and basic carbohydrates. Potatoes are more nutritious. But why not be accepted as a staple food?

After all, it tastes different from flour rice. If we cook the staple food in the usual way, we won't get the taste of rice noodles. Although the taste of powder is quite special, it will always feel monotonous.

Traditionally, it is not acceptable, because potatoes and sweet potatoes have always been complementary food and famine relief in the history of China, and they are not staple foods in a compilation. In other words, when you are poor, you only eat this food as a staple food. Wheat and rice, of course, if possible. This understanding is subconscious. It's like chatting with friends in the south, that is, eating rice, and talking with friends in the north about staple food, which is mostly steamed bread and noodles. It is also an embarrassing thing to tie potatoes and sweet potatoes as staple foods to the famine years.

Boiled potatoes abroad are usually mixed with a lot of oil. However, according to the traditional cooking methods in China, eating a lot of potatoes and sweet potatoes will easily lead to hyperacidity, acid regurgitation and vomiting, which will bring discomfort.

These are all problems that plague potatoes as a staple food.

In fact, in theory, sweet potatoes and potatoes can be used as staple foods. The output of sweet potato is also very large, and the planting cost is not high. In addition, they can provide rich carbohydrates and are also rich in various nutritional values. Why do people in China still eat rice and pasta every day? In fact, the biggest reason is because of habit. Rice, wheat and flour have been eaten for so many years, and even rice and wheat have been planted in large quantities since one or two thousand, so eating rice pasta has been a habit for many years. Even many friends don't know that potatoes or sweet potatoes can be used as staple food. Everyone thinks it is ingredients, and the food made into dishes is essentially different from rice and pasta. In fact, the Food and Agriculture Organization of the United Nations (FAO) has long included potato food in the staple food list, so it is no problem for us to eat sweet potatoes and potatoes instead of staple food.

I remember when I was studying in Europe, most Europeans and Americans didn't eat rice. Even if there is rice, there are few kinds. Their rice is not delicious, not as soft and rotten as ours. They taste rough grain by grain, and even feel undercooked. Few people choose rice as their staple food. Some people choose pasta made of wheat flour as their staple food, while others choose potato food as their staple food. British national dish "fish and chips" can also be a dinner, in which chips are the staple food, fish is the meat dish, and sometimes broccoli or other vegetable salads are used as vegetables. There is also "jacket potato", which is a super-large baked potato with its favorite meat and vegetables in the divided part. It also lives on potatoes. So it's not that potatoes or sweet potatoes can't be the staple food, but that China people prefer rice and are more accustomed to eating it.

Although my land is not good, geographically speaking, it is difficult to grow rice in the northern hemisphere, so European and American countries prefer crops that are not affected by temperature, such as wheat products, while the southern climate is more suitable for the growth of rice, a crop with high yield, so we naturally choose to eat rice. Some foreign netizens even argued that China people chose rice because of thousands of years of genes. The love for rice is predestined by DNA and the result of natural selection.

In fact, you can eat potatoes or sweet potatoes as your staple food. Compared with finely processed rice and wheat flour, they retain richer dietary fiber components and lower starch ratio, which is a more favorable choice for patients with hyperglycemia and diabetes. In addition, yam, corn and pumpkin can also be used as staple food. Note that the intake of staple food should not be excessive, and it is recommended that each meal should be 100~ 150g, about 2g. Many friends want to change this habit and eat one bowl with two bowls of rice, which can increase the proportion of vegetables and meat intake.