What are the four biggest nuts in the world?

The four major nuts in the world are hazelnuts, walnuts, almonds and cashew nuts. Their common characteristics are hard exocarp, which contains oily edible seeds and rich nutritional value. The world's four largest nuts are all cultivated in our country. Let's take a look at the world's four big nuts!

Hazelnut

Hazelnut is one of the four major nuts, but also one of the important nut tree species. It is a woody oil tree. It belongs to the genus Corylus of Corylaceae. There are 16 species in the world, mainly distributed in Asia, Europe and North America. The fruit is shaped like chestnut, oval and has a yellowish brown shell. Kind of benevolent fragrance, sweet taste, oily, mature harvest in autumn. The main producing area of Turkey, in China, hazelnut cultivation in a large area is relatively small, but the vast mountains of Northeast and North China, there are wild varieties, collected by the local people to sell as mountain products.

Hazelnut contains 8 kinds of essential amino acids and a variety of trace elements and minerals. Its content is several times to tens of times that of other nuts, in which phosphorus and calcium are beneficial to the development of human bones and teeth, and manganese has a tonifying and strengthening effect on bones, skin, tendons, ligaments and other tissues. Hazelnut is rich in fat, mainly unsaturated fatty acids that can not be synthesized by the human body. On the one hand, it can promote cholesterol metabolism, on the other hand, it can soften blood vessels and maintain the health of capillaries. Thus prevent and treat hypertension, arteriosclerosis and other cardiovascular diseases. Hazelnut also has the effect of promoting digestion, increasing appetite, improving memory and preventing aging.

Hazelnut is rich in oil, which is conducive to the absorption of fat-soluble vitamins in the human body, and has a good nourishing effect on people who are weak, win after illness and are prone to hunger. Hazelnut has a natural aroma, chewing more and more delicious in the mouth, has an appetizing effect. Hazelnut contains the anticancer chemical taxol, an active ingredient in taxol, which can treat ovarian and breast cancer as well as other cancers and prolong a patient's life. According to traditional Chinese medicine, hazelnut has the effect of tonifying spleen and stomach, tonifying strength, clear eyes and hiking, and is beneficial to lung and kidney deficiency such as thirst, night sweats, nocturnal urination and so on.

Walnut

Walnut is one of the four major nuts, also known as walnut, Qiang peach, walnut family plants, walnut kernel is rich in nutrients, containing protein 15 grams 20 grams per 100 grams, fat more, carbohydrates 10 grams; and contains calcium, phosphorus, iron and other trace elements and minerals, as well as carotene, riboflavin and other vitamins, beneficial to the human body, can strengthen the brain, is one of the nut foods loved by the common people.

Walnuts are found in North, Northwest, Southwest, Central, South and East China, and south of China. Distributed in Central Asia, West Asia, South Asia and Europe. Born in hillsides and hills of 400-1800 m above sea level, it is commonly cultivated in plain and hilly areas of China.

Almond kernel

Almond is one of the four major nuts, is a Rosaceae plant, including apricot seed and almond seed, every fruit ripening season, the almond kernel is peeled off to see the skin covered with brown coat of slightly flat egg-shaped almond, almond is the fruit of crops growing in the warm temperate zone, so it likes warm, sunny climate environment, so most of the almond trees are planted in the sun can be bathed in the sun.

Almond kernels contain 20% protein and do not contain starch. after grinding and pressing, the oil extracted is about half of its own weight. Almond oil is light yellow and has the effect of softening the skin although it has no fragrance.

Cashew nut

Cashew nuts are also known as trees, chicken cashew nuts, and meshou nuts. Evergreen trees with erect trunks, up to 10 m high. Cashew nut is a kind of kidney-shaped nut, which belongs to the family Laceraceae. It has rich nutritional value, can be fried, can also be used as medicine, and is one of the four famous nuts in the world.

Cashew nuts are rich in nutrition, including 47% fat, 21.2% protein, 22.3% carbohydrates, A, B1, B2 and other vitamins and minerals, especially manganese, chromium, magnesium, selenium and other trace elements. It has the effects of anti-oxidation, anti-aging, anti-tumor and anti-cardiovascular disease. Most of the fats are unsaturated fatty acids, of which oleic acid accounts for 67.4% of the total fatty acids and linoleic acid accounts for 19.8%. It is a good dietotherapy for patients with hyperlipidemia and coronary heart disease.

The content of vitamin B1 in cashew nuts is second only to sesame and peanuts, which has the effect of replenishing physical strength and eliminating fatigue, so it is suitable for people who are easy to get tired.