The food calorie comparison table is as follows:

The daily calorie requirement of a normal person is related to his body weight. The relationship between hourly calorie intake and body weight is about 1 kcal/hour/kg or 4.186 kJ/hour/kg.

So the normal average daily calorie requirement for an adult weighing 50 kg is as follows: Average calories required? = 4.186 kJ? * 24 hours * 50 kg = 5023.2 kJ.

Four Tips for Determining Food Calorie Levels

1. The greater the water content of the food, the lower the calorie value. Conversely, the more dry the food, the higher the calorie value. As an example, compared to different vegetables, the calorie value of vegetables with large water is the lowest, such as winter melon, cucumber, lettuce, etc., the calorie value is only 10~20 kcal/100g level.

In contrast, sweet peas, beans, etc. are also considered high water food, but "dry goods" slightly more, the calorie to 30 ~ 50 kcal / 100 grams; containing starch potatoes, yams and so on, the calorie is even higher, can be up to 60 ~ 80 kcal / 100 grams of the level.

2, for fruits, vegetables, fruit juices, sweet drinks and other foods, the higher the carbohydrate, the higher the calorie. These foods are usually low in fat (with the exception of durian and avocado) and low in protein. Their main source of calories is carbohydrates (including sugar and starch), especially sugar. So the sweeter varieties of the same fruit are higher in calories than the less sweet varieties.

3. The higher the fat content, the higher the calorie value, when the total amount of dry goods is about the same. Because 1 gram of protein and starch/sugar is 4 kcal, while 1 gram of fat is 9 kcal, the greater the proportion of fat, the higher the caloric value, given roughly equal amounts of dried goods.

For example, intact plant seeds, which also have a low water content, have 324 kcal/100 g for red kidney beans, 390 for soybeans, and 574 for raw peanuts, because all three of them have 0.6%, 16%, and 44% fat, respectively.

4, in the case of the labeled calorie value is as high, the higher the digestive absorption rate, the higher the calories. Dietary fiber in food slows down digestion and absorption, and resistant starch is not easily digested and absorbed. However, resistant starch is often counted in the calorie value as well.

Resistant starch is difficult to digest in the small intestine and goes directly to the large intestine, where it becomes "food" for the beneficial bacteria that produce healthful short-chain fatty acids. Naturally occurring whole grains, starchy beans and potatoes all contain some resistant starch. However, foods that have been refined and processed to remove dietary fiber are usually highly digestible and absorbable, such as rice and bread, cookies and bread.

Reference: People's Daily Online - Four Tips for Determining Food Calorie Levels

Reference: Baidu Encyclopedia - Food Calorie Chart