The husks of walnut contains a juice that will readily stain anything it comes into contact with. It has been used as a dye for cloth.Walnuts are one of the several high nutrient density foods. 100 grams of walnuts contain 15.2 gram protein, 65.2 gram fat, and 6.7 gram dietary fiber. The protein in walnuts provides many essential amino acids.
While English walnut is the predominant commercially distributed nut because of the ease of its processing, its nutrient density and profile is significantly different than black walnut. The table below compares some of the major nutrients between English and Black walnuts.Raw walnuts contain glyceryl triacylates of the n-3 fatty acid alpha-linolenic acid (ALA).A study has suggested that consumption of walnuts increases fat oxidation and reduces carbohydrate oxidation without affecting total consumption, suggesting that walnut consumption may improve the use of body fat in overweight adults.Walnuts have been shown to decrease the endothelial dysfunction associated with a high-fat meal.Scientists are not yet certain whether walnuts act as a cancer chemopreventive agent, an effect which may be a result of the fruit’s high phenolic content, antioxidant activity, and potent in vitro antiproliferative activity.Compared to certain other nuts, such as almonds, peanuts and hazelnuts, walnuts (especially in their raw form) contain the highest total level of antioxidants, including both free antioxidants and antioxidants bound to fiber.