1, constipation: yam has astringent effect. It contains amylase, polyphenol oxidase and other substances, which can enhance the digestion and absorption function of spleen and stomach. However, yam is rich in starch, which has astringent and antidiarrheal effects and can be used to treat diarrhea. However, people with constipation need to eat some foods that moisten the intestines and are conducive to laxative, which is just the opposite of the effect of yam, so people with constipation are not suitable for eating yam.
2. Diabetic patients: Yam is a kind of root food with high starch content. Eating too much yam will lead to an increase in blood sugar, which is not conducive to the health of diabetic patients, but will aggravate the condition. Therefore, diabetic patients are not suitable for eating yam.
3, allergic people: allergic people should not take yam. Because yam is rich in mucus, it can easily cause itchy skin. In particular, there are substances that stimulate the skin, such as choline and saponin. Excessive consumption of yam by people with allergies will cause symptoms such as numbness of the tongue and tight throat, so this group of people is not suitable for eating yam.