2. Chew the hard apple slowly and release the ingredients, which not only makes you feel full, but also has a low calorie.
3. Most pectin in apples is concentrated in the epidermis and its vicinity. Pectin can not only increase the amount of stool, but also absorb water during diarrhea, so that the stool can maintain a certain hardness. So don't peel apples when you are constipated, and it is more effective to eat peeled apples when you have diarrhea.