URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Lettuce, red leaf, raw, 1 cup shredded Protein (g) 0.37 Total lipid (fat) (g) 0.06 Carbohydrate, by difference (g) 0.63 Energy (kcal) 4.48 Sugars, total (g) 0.13 Fiber, total dietary (g) 0.25 Calcium, Ca (mg) 9.24 Iron, Fe (mg) 0.34 Magnesium, Mg (mg) 3.36 Phosphorus, P (mg) 7.84 Potassium, K (mg) 52.36 Sodium, Na (mg) 7 Zinc, Zn (mg) 0.06 Copper, Cu (mg) 0.01 Manganese, Mn (mg) 0.06 Selenium, Se (mcg) 0.42 Vitamin A, IU (IU) 2097.76 Carotene, beta (mcg) 1258.6 Carotene, alpha (mcg) 0 Vitamin E (alpha-tocopherol) (mg) 0.04 Cryptoxanthin, beta (mcg) 0 Lycopene (mcg) 0 Lutein + zeaxanthin (mcg) 482.72 Vitamin C, total ascorbic acid (mg) 1.04 Thiamin (mg) 0.02 Riboflavin (mg) 0.02 Niacin (mg) 0.09 Pantothenic acid (mg) 0.04 Vitamin B-6 (mg) 0.03 Folate, total (mcg) 10.08 Vitamin K (phylloquinone) (mcg) 39.28