Iceberg lettuce is a widespread and nutritious leafy green that is rich in vitamins and antioxidants. It provides important nutrients like potassium, manganese, iron, calcium, magnesium, phosphorus, vitamin A, K, C, thiamine, B6, and folate. While low in calories at only 10 per serving, iceberg lettuce can be added to sandwiches, tacos, and salads. It is considered good for weight loss efforts due to its high water content and fiber. Iceberg lettuce may also help fight heart disease and strokes when consumed by pregnant women due to its folate content.