Due to the high nutritional value of nuts and their taste, more and more families will include nuts on their shopping list. However, did you know? There are several types of nuts must not buy. Such as the heavier the taste of nuts, its delicious behind the possibility of hiding spoiled nuts will be greater. Many nuts are susceptible to infestation such as aflatoxin. Aflatoxin triggered by acute poisoning, mainly damage to the liver, can induce liver cancer in animals, can also induce stomach cancer, kidney cancer, rectal cancer and cancer of the breast, ovaries, small intestine and other parts of the body. Nuts contain a lot of fat, protein, carbohydrates, ordinary heating is not enough to destroy them, but when the nuts are fried, the temperature has long been above 200 ℃, and at this time these nutrients originally beneficial to the body began to be partially transformed into carcinogenic stupid and pyrene, heterocyclic amines, acrylamide and other substances. Some melon seed producers have abused industrial coloring and industrial paraffin in their production. Many non-food colorings are highly carcinogenic. Some processors also use bleach and other chemicals to cosmetically treat the nuts and eliminate miscellaneous color stains. This often results in kernels containing excessive residues of harmful chemicals. In particular, pistachio-like split nuts, the kernels are more likely to accumulate harmful treatment chemicals. These cosmetic chemicals are very dangerous to human health. A variety of nut flavors on the market, some people like salty, some like creamy, some like green tea flavor, some like five flavors. Generally speaking, the heavier the taste, the more salt is often added. Secondly, many heavy flavors and aromas of nuts, in the processing of added flavors, saccharin and other substances, cream flavored melon seeds also added margarine, these things are not good for the body; again, the heavier the taste of nuts, the greater the possibility that behind its delicious hidden spoiled nuts.