Young lettuce is one of the favourite leafy vegetables. Its crispy, off-white, and yellow leaves are some of the incredible sources of essential nutrients that benefit health. Used mostly in crunchy green salads or healthy sandwiches, they are year-round sources of vitamin A, vitamin C, and other nutrients. 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.