The edible value is best when the shell is removed.

86% of the fat in walnuts is unsaturated fatty acids. Walnuts are rich in copper, magnesium, potassium, vitamin B6, folic acid and vitamin B1. They also contain fiber, phosphorus, niacin, iron, vitamin B2 and pantothenic acid. Every 50 grams of walnuts contains 3.6 grams of water, 7.2 grams of protein, 31 grams of fat, and 9.2 grams of carbohydrates.

Walnuts are sweet in taste and warm in nature, and enter the kidney, lung, and large intestine meridians. It can nourish the kidneys, strengthen the essence and strengthen the waist, warm the lungs and relieve asthma, and moisturize the intestines and relieve constipation. Indications: Kidney deficiency, asthma, cough, and low back pain; (woody compartment in the nucleus) is bitter in taste and warm in nature; nourishes the kidneys and astringes essence.

Extended information:

Walnut, also known as walnut and walnut, is the most widely cultivated at home and abroad. Deciduous trees are generally 10 to 20 meters tall, with a maximum height of more than 30 meters, a trunk diameter of about 1 meter, and a lifespan of one to two hundred years, with the longest being more than 500 years old. The crown is open and semicircular or round-headed, with a diameter of 6 to 9 meters. The bark is grayish white to dark brown, the bark of young trees is smooth, and the bark of old trees has irregular shallow longitudinal cracks. The branches are thick and smooth. The young branches are green when they are first born, and may also be slightly red in early spring. After they stop growing, they turn to bright gray or gray-brown with white lenticels.

Reference source: Baidu Encyclopedia-Walnut