URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Fast foods, tostada, with beef and cheese, 1 piece Protein (g) 18.99 Total lipid (fat) (g) 16.35 Carbohydrate, by difference (g) 22.77 Energy (kcal) 314.59 Calcium, Ca (mg) 216.79 Iron, Fe (mg) 2.87 Magnesium, Mg (mg) 63.57 Phosphorus, P (mg) 179.3 Potassium, K (mg) 572.13 Sodium, Na (mg) 896.5 Zinc, Zn (mg) 3.68 Copper, Cu (mg) 0.26 Manganese, Mn (mg) 0.5 Selenium, Se (mcg) 19.07 Vitamin A, IU (IU) 712.31 Retinol (mcg) 17.93 Vitamin C, total ascorbic acid (mg) 2.61 Thiamin (mg) 0.1 Riboflavin (mg) 0.55 Niacin (mg) 3.15 Pantothenic acid (mg) 1.89 Vitamin B-6 (mg) 0.23 Folate, total (mcg) 74.98 Vitamin B-12 (mcg) 1.17 Folic acid (mcg) 60.31 Folate, DFE (mcg_DFE) 117.36 Cholesterol (mg) 40.75 Fatty acids, total saturated (g) 10.39 Fatty acids, total monounsaturated (g) 3.34 Fatty acids, total polyunsaturated (g) 0.97