What is the nutritional value of romaine lettuce vs. regular lettuce or other types of lettuce?

Question

What is the nutritional value of romaine lettuce vs. regular lettuce or other types of lettuce?

Answer 1

Lettuce (Iceberg) 1/2 head

Calories 45, Carb 9gm, Fiber 3gm, Protein 3gm, Potassium 350gm, Sodium 30gm, Vit A 10%, Vit B 20%, Calciuim 6%, Iron 6%

Lettuce (Boston, Bibb, Butter) 1 head

Calories 20, Carb 4gm, Fiber 2gm, Protein 2 gm, Potassium 420gm, Sodium 10gm, Vit A 30%, Vit B 20%, Calcium 6%, Iron 2%

Lettuce, Red or Green Leaf, 100 g.

Calories 20, Carb 4gm, Fiber 2gm, Protein 1gm, Potassium 260gm, Sodium 10gm, Vit A 40%, Vit B 30%, Calcium 6%, Iron 8%

Lettuce (Romaine) 100 g. inner leaf

Calories 15, Carb 2gm, Fiber 2gm, Protein 2gm, Potassium 290gm, Sodium 10gm, Vit A 50%, Vit B 40%, Calcium 4%, Iron 6%