核桃,亦称胡桃,相传是汉时张骞出使西域时带回胡桃种至长安,而后在陕西、甘肃、河北、河南、四川、山西、云南、贵州等大部分省市普遍栽种。核桃作为一种传统干果食品,历史久远。其营养丰富,富含人体必需的18种氨基酸。现代医学证明,500克核桃仁相当于1500克瘦肉、250克鸡蛋和4500 Walnuts, also known as walnuts, were said to have been planted by Zhang Qian in the Western Region when they came back to Changan in the Western Regions and then planted them in most provinces and cities such as Shaanxi, Gansu, Hebei, Henan, Sichuan, Shanxi, Yunnan and Guizhou. Walnut as a traditional dried fruit food has a long history. Its nutrient-rich, rich in essential 18 kinds of amino acids. Modern medicine has proved that 500 grams of walnut equivalent to 1500 grams of lean meat, 250 grams of eggs and 4500