Hearts of lettuce belong to the Little Gem variety, known for its use in salads. With origins in Spain, this lettuce is cultivated in regions like the Campo de Cartagena and the Guadalentín Valley, and is sold in trays weighing 0.400 kg. Lettuce is a vegetable that provides multiple benefits, including high fiber content, diuretic and antioxidant properties due to the presence of Vitamin A and potassium. These features are useful against anemia, weakness, and may even help with sleep.