The contents of oleic acid, γ -linolenic acid and α -linolenic acid in hazelnut were 465438±0.8g, 0.0433g and 0.0369g, respectively. Hazelnut, also called hazelnut, is the seed of the bush hazelnut tree. Nuts contain fat, starch and other carbohydrates. In addition, it also contains many vitamins and trace elements. The oil content of hazelnut is second only to that of walnut, and the fat is mostly composed of unsaturated fatty acids. The estimated P/S value is very high, so it is a good product for fitness and longevity.