URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Tomatoes, red, ripe, raw, year round average, 1 slice, medium (1/4" thick) Protein (g) 0.18 Total lipid (fat) (g) 0.04 Carbohydrate, by difference (g) 0.78 Energy (kcal) 3.6 Sugars, total (g) 0.53 Fiber, total dietary (g) 0.24 Calcium, Ca (mg) 2 Iron, Fe (mg) 0.05 Magnesium, Mg (mg) 2.2 Phosphorus, P (mg) 4.8 Potassium, K (mg) 47.4 Sodium, Na (mg) 1 Zinc, Zn (mg) 0.03 Copper, Cu (mg) 0.01 Manganese, Mn (mg) 0.02 Selenium, Se (mcg) 0 Vitamin A, IU (IU) 166.6 Retinol (mcg) 0 Carotene, beta (mcg) 89.8 Carotene, alpha (mcg) 20.2 Vitamin E (alpha-tocopherol) (mg) 0.11 Cryptoxanthin, beta (mcg) 0 Lycopene (mcg) 514.6 Lutein + zeaxanthin (mcg) 24.6 Vitamin C, total ascorbic acid (mg) 2.54 Thiamin (mg) 0.01 Riboflavin (mg) 0 Niacin (mg) 0.12 Pantothenic acid (mg) 0.02 Vitamin B-6 (mg) 0.02 Folate, total (mcg) 3 Vitamin B-12 (mcg) 0 Vitamin K (phylloquinone) (mcg) 1.58 Folic acid (mcg) 0 Folate, DFE (mcg_DFE) 3 Cholesterol (mg) 0 Fatty acids, total saturated (g) 0.01 Fatty acids, total monounsaturated (g) 0.01 Fatty acids, total polyunsaturated (g) 0.03