Lollo Rosso has fringed and crinkled leaves that are tinged deep red at their ends, with a fairly tender, yet crisp texture. It contains the antioxidant quercetin, which is believed to reduce the risk of heart disease. Buy it online fast delivery! Lettuce provides significant amounts of vitamins A and K. They have a high water content, making them a refreshing choice during hot weather. They also provide calcium, potassium, vitamin C, and folate.