Nutrients that can provide calories in the diet are sugar (carbohydrate), fat, protein, alcohol, organic acids and so on. The calories they contain are: sugar (carbohydrate) 4 calories, fat 9 calories, protein 4 calories, alcohol 7 calories and organic acid 2.4 calories.

To calculate the calories contained in food or diet, we must first know the weight of calorie nutrients, and then use the following formula to calculate:

Calories (kilocalories) = grams of sugar ×4+ grams of protein ×4+ grams of fat ×9+ grams of alcohol × 7.

The heat consumed by adults is utilized in three aspects: basic metabolism, activity and food thermal effect; During growth and pregnancy, the tissue structure needs extra heat.

Low calorie food:

1, Apple100g /52 kcal

Apple is the slimming fruit that most people will choose, because it is rich in pectin, which can help gastrointestinal peristalsis and eliminate toxins in the body. Best of all, it can also reduce heat absorption. Plus apples contain a lot of potassium, which can prevent leg edema.

2. Banana100g/125 kcal

Bananas are essential for many fruit diet meals, because bananas are rich in fiber, vitamin A, potassium and pectin, so they can effectively regulate the intestines and help defecate. Bananas also have the effect of removing water, which is not only the best slimming fruit, but also a beauty product, which will moisturize the skin after eating. But bananas are high in calories, and if you eat too much, you will get fat.

3. Grapefruit100g /28 kcal

Europeans and Americans like to eat acidic fruits such as grapefruit to keep fit, because acidic fruits can promote intestinal digestion. Grapefruit is rich in vitamin C, which can eliminate fatigue and make skin beautiful.