Yam is a kind of dual-use food, in the consumption of yam should try to avoid with greasy indigestible food, alkaline food and seafood products together, because some of these foods will produce with yam, some will destroy the nutritional value of yam itself, and some even cause people adverse reactions. 1, greasy indigestible food: such as cream cake, fried snacks, glutinous rice cake, fried chicken, etc. These foods are not easy to digest, and yam itself contains more starch, eat together may lead to indigestion, not only the role of yam itself to help digestion does not play, but affect the health of the digestive system; 2, alkaline food: yam contains amylase, tofu, peas are alkaline food, and alkaline ingredients will make the amylase in yam failure, reducing its nutritional value; 3, seafood products: seafood products Including fish, shrimp, crab, etc., yam is a warm food, but if eaten together, there will be a chemical reaction that can easily lead to constipation, nausea, vomiting conditions after eating. Yam is relatively mild in nature and is a tonic for the body and mind, with an astringent function. However, people with real heat and evil toxins in their bodies should not eat yam, as it may aggravate the condition and seriously damage their health.