15 calories 1 gram of protein 2 grams of fiber 3 grams of carbohydrates Romaine lettuce is rich in vitamins A and K, as well as calcium, potassium, iron and magnesium, the experts note.

Keto vegetables such as broccoli, green beans, spinach, and bell peppers have less carbs and starch. Learn why green veggies ...

Because it's so rich in water, lettuce is very low in calories, containing fewer than 10 calories per cup. Lettuce, like romaine, is a rich source of vitamins A, K, and folate. It also provides ...