Complete Protein

Romaine lettuces calories are 20 percent protein. Like all whole foods, much of this protein is complete, but the amount can be increased by combining with balancing proteins. It prevents you from many heart diseases. Moderate amount of potassium is present in this lettuce. This protects your heart by checking blood pressure and heart rate. There are more nutritional benefits of iceberg lettuce like the essential nutrients that harden arteries and the dietary fiber content maintains the blood flow rate to the heart keeping your heart healthy.