8 calories | 1g Carbs | 0g Fat | 2g Protein
A dieter's dream, romaine lettuce has about 8 calories and 1 to 2 grams of carbohydrates per cup . Although it's low in fiber, it's high in minerals, such as calcium, phosphorous, magnesium, and potassium. It's naturally low in sodium. Plus, romaine lettuce is packed with vitamin C, vitamin K, and folate.