Lettuce, butterhead (includes boston and bibb types), raw

Calories from carbs 38%, protein 45%, fat 17%

Nutritional data per head (5" dia) (163 grams)

Net carbs1.8grams
Protein2.2grams
Fat0.4grams
Calories21kcal
Total carbs3.6gramsFiber1.8gramsSugars1.5gramsSaturated fat0gramsSodium8mg(0% RDA)Magnesium21mg(5% RDA)Potassium388mg(19% EMR)

Nutritional data per leaf, large (15 grams)

Net carbs0.2grams
Protein0.2grams
Fat0grams
Calories2kcal
Total carbs0.3gramsFiber0.2gramsSugars0.1gramsSaturated fat0gramsSodium1mg(0% RDA)Magnesium2mg(0% RDA)Potassium36mg(2% EMR)

Nutritional data per leaf, medium (7.5 grams)

Net carbs0.1grams
Protein0.1grams
Fat0grams
Calories1kcal
Total carbs0.2gramsFiber0.1gramsSugars0.1gramsSaturated fat0gramsSodium0mg(0% RDA)Magnesium1mg(0% RDA)Potassium18mg(1% EMR)

Nutritional data per leaf (5 grams)

Net carbs0.1grams
Protein0.1grams
Fat0grams
Calories1kcal
Total carbs0.1gramsFiber0.1gramsSugars0gramsSaturated fat0gramsSodium0mg(0% RDA)Magnesium1mg(0% RDA)Potassium12mg(1% EMR)

Nutritional data per 100 grams

Net carbs1.1grams
Protein1.4grams
Fat0.2grams
Calories13kcal
Total carbs2.2gramsFiber1.1gramsSugars0.9gramsSaturated fat0gramsSodium5mg(0% RDA)Magnesium13mg(3% RDA)Potassium238mg(12% EMR)

Source  USDA Food Composition Databases

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