URMC / Encyclopedia / Content Search Encyclopedia Nutrition Facts Lettuce, red leaf, raw, 1 leaf inner Protein (g) 0.03 Total lipid (fat) (g) 0.01 Carbohydrate, by difference (g) 0.06 Energy (kcal) 0.42 Sugars, total (g) 0.01 Fiber, total dietary (g) 0.02 Calcium, Ca (mg) 0.86 Iron, Fe (mg) 0.03 Magnesium, Mg (mg) 0.31 Phosphorus, P (mg) 0.73 Potassium, K (mg) 4.86 Sodium, Na (mg) 0.65 Zinc, Zn (mg) 0.01 Copper, Cu (mg) 0 Manganese, Mn (mg) 0.01 Selenium, Se (mcg) 0.04 Vitamin A, IU (IU) 194.79 Carotene, beta (mcg) 116.87 Carotene, alpha (mcg) 0 Vitamin E (alpha-tocopherol) (mg) 0 Cryptoxanthin, beta (mcg) 0 Lycopene (mcg) 0 Lutein + zeaxanthin (mcg) 44.82 Vitamin C, total ascorbic acid (mg) 0.1 Thiamin (mg) 0 Riboflavin (mg) 0 Niacin (mg) 0.01 Pantothenic acid (mg) 0 Vitamin B-6 (mg) 0 Folate, total (mcg) 0.94 Vitamin K (phylloquinone) (mcg) 3.65