URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Lettuce, cos or romaine, raw, 1 leaf inner Protein (g) 0.07 Total lipid (fat) (g) 0.02 Carbohydrate, by difference (g) 0.2 Energy (kcal) 1.02 Sugars, total (g) 0.07 Fiber, total dietary (g) 0.13 Calcium, Ca (mg) 1.98 Iron, Fe (mg) 0.06 Magnesium, Mg (mg) 0.84 Phosphorus, P (mg) 1.8 Potassium, K (mg) 14.82 Sodium, Na (mg) 0.48 Zinc, Zn (mg) 0.01 Copper, Cu (mg) 0 Manganese, Mn (mg) 0.01 Selenium, Se (mcg) 0.02 Vitamin A, IU (IU) 348.42 Retinol (mcg) 0 Carotene, beta (mcg) 209.04 Carotene, alpha (mcg) 0 Vitamin E (alpha-tocopherol) (mg) 0.01 Cryptoxanthin, beta (mcg) 0 Lycopene (mcg) 0 Lutein + zeaxanthin (mcg) 138.72 Vitamin C, total ascorbic acid (mg) 1.44 Thiamin (mg) 0 Riboflavin (mg) 0 Niacin (mg) 0.02 Pantothenic acid (mg) 0.01 Vitamin B-6 (mg) 0 Folate, total (mcg) 8.16 Vitamin B-12 (mcg) 0 Vitamin K (phylloquinone) (mcg) 6.15 Folic acid (mcg) 0 Folate, DFE (mcg_DFE) 8.16 Cholesterol (mg) 0 Fatty acids, total saturated (g) 0 Fatty acids, total monounsaturated (g) 0 Fatty acids, total polyunsaturated (g) 0.01