URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Mountain yam, hawaii, raw, 1 yam Protein (g) 5.63 Total lipid (fat) (g) 0.42 Carbohydrate, by difference (g) 68.5 Energy (kcal) 281.4 Calcium, Ca (mg) 109.2 Iron, Fe (mg) 1.85 Magnesium, Mg (mg) 50.4 Phosphorus, P (mg) 142.8 Potassium, K (mg) 1755.6 Sodium, Na (mg) 54.6 Zinc, Zn (mg) 1.13 Copper, Cu (mg) 0.46 Manganese, Mn (mg) 1.02 Selenium, Se (mcg) 2.94 Vitamin A, IU (IU) 0 Retinol (mcg) 0 Vitamin C, total ascorbic acid (mg) 10.92 Thiamin (mg) 0.43 Riboflavin (mg) 0.08 Niacin (mg) 2.02 Pantothenic acid (mg) 1.82 Vitamin B-6 (mg) 0.75 Folate, total (mcg) 58.8 Vitamin B-12 (mcg) 0 Folic acid (mcg) 0 Folate, DFE (mcg_DFE) 58.8 Cholesterol (mg) 0 Fatty acids, total saturated (g) 0.09 Fatty acids, total monounsaturated (g) 0.02 Fatty acids, total polyunsaturated (g) 0.19