Walnut (Juglans regia)
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The walnut tree is a very valuable plant, every part of the tree can be used: walnut seeds, husk, leaves and wood. Walnut seeds are a good source of nutrients, particularly proteins, essential amino acids, dietary fibre and antioxidants. In China, pairs of large, old and symmetrically shaped walnuts are valued highly and used as an investment. Flowers or vegetable gardens should not be planted close to walnut trees, because they secrete chemicals into the soil to prevent competing vegetation from growing.
Leaves are collected while seeds are still green, and dried to be used as tea for problems with digestion, high blood pressure, and worms. Its external use is recommended for rashes and hemorrhoids. As a poultice, it is used for irritated eyes, acne, eczema and boils. The dried husk contains vitamins, and it is a basis for hair oil and natural wood stain.
The leaves contain juglone, flavonoids, tannins, essential oil, vitamin C, and seeds contain fatty oils, flavonoids, proteins, vitamins B1, B2, C, E, and minerals (Na, K, Ca, P, Mn, Mg, Fe, Cu, Zn).