URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Fast foods, tostada, with beans, beef, and cheese, 1 piece Protein (g) 16.09 Total lipid (fat) (g) 16.94 Carbohydrate, by difference (g) 29.66 Energy (kcal) 333 Calcium, Ca (mg) 189 Iron, Fe (mg) 2.45 Magnesium, Mg (mg) 67.5 Phosphorus, P (mg) 173.25 Potassium, K (mg) 490.5 Sodium, Na (mg) 870.75 Zinc, Zn (mg) 3.17 Copper, Cu (mg) 0.32 Manganese, Mn (mg) 0.36 Selenium, Se (mcg) 20.92 Vitamin A, IU (IU) 1275.75 Retinol (mcg) 42.75 Vitamin C, total ascorbic acid (mg) 4.05 Thiamin (mg) 0.09 Riboflavin (mg) 0.5 Niacin (mg) 2.86 Pantothenic acid (mg) 1.87 Vitamin B-6 (mg) 0.25 Folate, total (mcg) 85.5 Vitamin B-12 (mcg) 1.12 Folic acid (mcg) 0 Folate, DFE (mcg_DFE) 85.5 Cholesterol (mg) 74.25 Fatty acids, total saturated (g) 11.48 Fatty acids, total monounsaturated (g) 3.51 Fatty acids, total polyunsaturated (g) 0.6