There are two kinds of nuts: tree nuts and seeds. Hazelnut, walnut, almond and cashew are all tree nuts, that is, the essence of plants, which are rich in unsaturated fatty acids such as linolenic acid and linoleic acid, dietary fiber, vitamin B, vitamin E and trace elements such as phosphorus, calcium, zinc and iron. Among the "four big nuts", hazelnut has not only been eaten for the longest time, but also has the highest nutritional content, so it has the title of "king of nuts". At first, people only regarded hazelnut as a good natural food, but with the deepening of its research, people found that it played an important role in health. In the experiment, the University of Portland found that hazelnut contains a strong anticancer component, which has a good inhibitory effect on ovarian cancer, breast cancer and other cancers, and can prolong the life span of patients for nearly one year. In addition, the content of magnesium, calcium, potassium and other trace elements in hazelnut is very high, and long-term consumption is helpful to regulate blood pressure. In Turkey, the main producing area of hazelnut, it can not only be eaten alone, but also be an indispensable match in all kinds of cakes, ice cream, chocolate and other sweets. Turks mainly eat meat, and barbecue or barbecue is the most important food. However, a strange phenomenon is that most Turks have normal blood lipid indexes and have not harmed their health because of eating meat. Researchers at Istanbul Medical University in Turkey explained that this is because hazelnut has the function of lowering cholesterol, which can avoid the harm of saturated fatty acids in meat to the body and effectively prevent cardiovascular and cerebrovascular diseases. Many people think hazelnuts are easy to get bored if they are eaten too much. In fact, it has natural aroma and appetizing effect, and its rich cellulose also helps digestion and prevent constipation. For white-collar workers who work in front of a computer every day, eating more nuts such as hazelnuts can enhance the chewing ability of facial muscles, thus improving their eyesight. At present, there are two kinds of hazelnuts in dried fruit shops: small hazelnuts (including hairy hazelnuts and hazelnuts) and imported big hazelnuts. Hazelnut tastes good and smells pure. The roots of Corylus heterophylla are slightly protruding, arc-shaped, and the nuts are sweet; Corylus heterophylla has smooth roots and sweet nut flavor; Hazelnuts are mostly imported from Turkey or the United States, with good color and big size, but light taste. Hazelnut can be eaten raw or fried. Crushed nuts are put in when making cakes, or added into milk, yogurt and ice cream to make hazelnut milk, hazelnut fat, etc. It is also a very good way to eat. In addition, hazelnuts can also be used to cook porridge: hazelnuts, lotus seeds and japonica rice are put together to make "hazelnut porridge", which is not only delicious, but also nutritious, and patients with cancer and diabetes can drink more at ordinary times.