The macros found in Romaine Lettuce are split (approximately) 24% protein, 63% carbs, and 13% fat of total calories.
In g of Romaine Lettuce there are 17 Calories, 1.2 grams Protein, 3.3 grams Carbs, and 0.3 grams Fat.
In oz of Romaine Lettuce there are 5 Calories, 0.3 grams Protein, 0.9 grams Carbs, and 0.1 grams Fat.
Check out the macronutrient breakdowns of other ingredients, including a list of high protein foods and more in our Macros in Food page, or search the calorie and macro content of another food below.