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A walnut is the nut of any tree of the genus Juglans, particularly the Persian or English walnut, Juglans regia. Technically a walnut is the seed of a drupe or drupaceous nut, and thus not a true botanical nut.

Amount Per 
1 cup, in shell, edible yield (7 nuts) (28 g)
1 oz (14 halves) (28.4 g)
1 cup, ground (80 g)
1 cup shelled (50 halves) (100 g)
100 grams
1 cup, chopped (117 g)
1 cup pieces or chips (120 g)
1 cup, ground (80 g)

Calories 523
% Daily Value*
Total Fat 52 g 80%
Saturated fat 4.9 g 24%
Polyunsaturated fat 38 g
Monounsaturated fat 7 g
Cholesterol 0 mg 0%
Sodium 2 mg 0%
Potassium 353 mg 10%
Total Carbohydrate 11 g 3%
Dietary fiber 5 g 20%
Sugar 2.1 g
Protein 12 g 24%
Vitamin A 0% Vitamin C 1%
Calcium 7% Iron 12%
Vitamin D 0% Vitamin B-6 20%
Vitamin B-12 0% Magnesium 31%