Fruits, vegetables, juices, sweeteners and other foods, the higher the carbohydrate content, the higher the calories, usually low in fat (except durian and avocado) and low in protein. Their calories mainly come from carbohydrates (including sugar and starch), especially sugar. Sugar is a solute. The higher the sugar content, the lower the moisture content in fruits or drinks.

So the same fruit, sweet varieties have higher calories than sweet varieties. For example, grapes are very sweet, and the sugar content can even reach more than 20%. 100% grape juice products usually contain 15% or more sugar.

Extended data:

At the same high labeled calorie value, the higher the digestion and absorption rate, the higher the calorie, and the dietary fiber in food will delay the digestion and absorption rate, so resistant starch will not be easily digested and absorbed. However, resistant starch is often calculated in the calorie value of food.

Resistant starch is a part of starch. Although it is pure starch, the small intestine is difficult to digest. They will directly enter the large intestine as fermentable dietary fibers, become "particles" of beneficial bacteria in the large intestine, and produce "short-chain fatty acids". These short-chain fatty acids are helpful to inhibit harmful bacteria, prevent intestinal cancer and control blood lipid levels.

Baidu encyclopedia-calories

People's Network-Four methods to easily judge the calorie level of food.