Walnut seeds are high density source of nutrients, particularly proteins and essential fatty acids. Walnuts, like other tree nuts, must be processed and stored properly. Poor storage makes walnuts susceptible to insect and fungal mold infestations; the latter produces aflatoxin - a potent carcinogen. Mold infested walnut seed batch should not be screened then consumed; the entire batch should be discarded.

Raw walnuts contain glyceryl triacylates of the n-3 fatty acid alpha-linolenic acid (ALA), which is not as effective in humans as long-chain n-3 fatty acids, and (mostly insoluble) antioxidants. Roasting reduces antioxidant quality. In 2010, a report published in the Journal of the American College of Nutrition said that walnuts and walnut oil improve reaction to stress.

Etymologically, the word derives from the Germanic wal- and Old English wealhhnutu, literally "foreign nut", wealh meaning "foreign" (wealh is akin to the terms Welsh and Vlach; see Walha). For the walnut to be identified as a "foreign" nut by Anglo-Saxons arriving in the fifth century, native Britons must have passed to them the tradition that it had been introduced to England from Gaul and Italy.

Walnuts Nutrition Facts: Calories, Carbs, and Health Benefits

The composition of walnuts is 4.07% water, 13.71% carbohydrates, 15.23% protein, 6.7% dietary fiber, and 65.21% fat. If you consume it will provide you with 0 grams of protein. That translates to 0 percent of the 46 grams of protein women should include in their daily diet and 0 percent of the 56 grams men need on a daily basis. That same in an amount measuring 100 grams (3.5 Oz), walnuts provide 2738 kilojoules (654 kilocalories) of energy and are a natural source of Vitamin B6 (pyridoxine), Vitamin B1 (thiamin), and Vitamin B9 (folate, DFE) (41.31%, 31%, and 24.5% of the Daily Value, respectively). This means that if you add walnuts in your diet it will help your body to produce red blood cells (RBCs) and neurotransmitters, break down peptides into amino acid monomers so that it can be used in the body, decrease symptoms of premenstrual syndrome (PMS) (in females) and will be effective against mood disorders like depression, because vitamin B6 is responsible for creating neurotransmitters and regulates emotions through hormones like serotonin and dopamineanemiamorning sickness during pregnancy in women. With this they contain a large amount of Manganese, Copper and Magnesium attaining 189.67%, 176.22% and 50.97% of the Daily Value in a 100 g (3.5 Oz), respectively.