URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Lettuce, red leaf, raw, 1 NLEA serving Protein (g) 1.13 Total lipid (fat) (g) 0.19 Carbohydrate, by difference (g) 1.92 Energy (kcal) 13.6 Sugars, total (g) 0.41 Fiber, total dietary (g) 0.76 Calcium, Ca (mg) 28.05 Iron, Fe (mg) 1.02 Magnesium, Mg (mg) 10.2 Phosphorus, P (mg) 23.8 Potassium, K (mg) 158.95 Sodium, Na (mg) 21.25 Zinc, Zn (mg) 0.17 Copper, Cu (mg) 0.02 Manganese, Mn (mg) 0.17 Selenium, Se (mcg) 1.27 Vitamin A, IU (IU) 6368.2 Carotene, beta (mcg) 3820.75 Carotene, alpha (mcg) 0 Vitamin E (alpha-tocopherol) (mg) 0.13 Cryptoxanthin, beta (mcg) 0 Lycopene (mcg) 0 Lutein + zeaxanthin (mcg) 1465.4 Vitamin C, total ascorbic acid (mg) 3.14 Thiamin (mg) 0.05 Riboflavin (mg) 0.07 Niacin (mg) 0.27 Pantothenic acid (mg) 0.12 Vitamin B-6 (mg) 0.08 Folate, total (mcg) 30.6 Vitamin K (phylloquinone) (mcg) 119.26