Romaine lettuce

Romaine or cos lettuce is a variety of lettuce that grows in a tall head of sturdy leaves with firm ribs down their centers.

Romaine lettuce
Nutritional value per 100 g (3.5 oz)
Energy 72 kJ (17 kcal)
Carbohydrates
3.3 g
Dietary fibre 2.1 g
Fat
0.3 g
Protein
1.2 g
Vitamins
Vitamin A equiv. (36%) 290 μg
Folate (B9) (34%) 136 μg
Vitamin C (29%) 24 mg
Trace metals
Calcium (3%) 33 mg
Iron (7%) 0.97 mg
Phosphorus (4%) 30 mg
Potassium (5%) 247 mg
Other constituents
Water 95 g
Units
μg = micrograms • mg = milligrams
IU = International units
Percentages are roughly approximated using US recommendations for adults.
SOURCE: USDA NUTRIENT DATABASE