Whether eating a food helps to lose weight or gain weight depends on how you eat it. Sweet potato, potato and corn are recommended by dieters, but many people will feel fat after eating them. In fact, this contradiction lies not in the food itself, but in the way and quantity of eating.

We know that the key to losing weight is to achieve a negative balance of energy, which means that the energy consumed is greater than the energy consumed. Therefore, even foods with small calories, if eaten in large quantities, may still cause excess energy and increase the risk of obesity.

Sweet potatoes and potatoes belong to potatoes, and corn belongs to coarse grains. Their similarity is rich in dietary fiber, vitamins and minerals. Compared with polished rice flour, they feel more full, that is, if they eat the same amount of food, they are more tolerant of hunger. Another characteristic of dietary fiber is that it can delay the gastric emptying time, slow down the rate of postprandial blood sugar rise, and also help to lose weight. Therefore, these three foods are also common foods recommended to many dieters.

Bananas are also rich in dietary fiber, but because bananas are high in calories in fruits, it is necessary to control the amount when eating. The Dietary Guide for China Residents suggests that the daily fruit consumption of adults should be controlled at about half a catty. If you want to lose weight, you'd better eat some low-sugar and low-calorie fruits. For example, eating100g of apples consumes about 50kcal, while eating100g of bananas consumes twice as many calories as apples. In terms of satiety, apples feel fuller.

Among sweet potatoes, potatoes and corn, corn has the highest calorie, followed by sweet potatoes and potatoes. The calories of corn and sweet potato are very close, the difference is only 10kcal, and potatoes are about 30kcal lower than the first two foods. These three foods are rich in carbohydrates and can be eaten as staple foods. When losing weight, besides paying attention to the consumption, cooking methods are also very important. Although potatoes seem to be relatively low in calories, many people still eat them as vegetables. Potatoes are very oil-absorbent, and the calories of shredded potatoes and potato stew are not low. So when you eat, you must lose the corresponding staple food, otherwise the calories will exceed the standard if you are not careful.

Therefore, you can't say which food is more likely to gain weight. If you control the amount, you don't have to worry about gaining weight. If it is to lose weight, then it is best not to add oil and sugar, and it is best to eat the original flavor.