URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Arrowhead, cooked, boiled, drained, with salt, 1 corm, medium Protein (g) 0.54 Total lipid (fat) (g) 0.01 Carbohydrate, by difference (g) 1.94 Energy (kcal) 9.36 Calcium, Ca (mg) 0.84 Iron, Fe (mg) 0.15 Magnesium, Mg (mg) 5.88 Phosphorus, P (mg) 23.64 Potassium, K (mg) 105.72 Sodium, Na (mg) 30.48 Zinc, Zn (mg) 0.03 Copper, Cu (mg) 0.02 Manganese, Mn (mg) 0.03 Selenium, Se (mcg) 0.07 Vitamin A, IU (IU) 0 Retinol (mcg) 0 Vitamin C, total ascorbic acid (mg) 0.04 Thiamin (mg) 0.02 Riboflavin (mg) 0.01 Niacin (mg) 0.14 Pantothenic acid (mg) 0.05 Vitamin B-6 (mg) 0.02 Folate, total (mcg) 1.08 Vitamin B-12 (mcg) 0 Folic acid (mcg) 0 Folate, DFE (mcg_DFE) 1.08 Cholesterol (mg) 0