Spinach is a superfood. It is loaded with tons of nutrients in a low-calorie package. Dark, leafy greens like spinach are important for skin, hair, and bone health. They also provide protein, iron, vitamins, and minerals.
Iceberg lettuce, also known as crisphead lettuce, has pale green leaves and grows in cabbage-like bulbs. It grows best in cool climates and requires a long winter season to grow fully. Lettuce and other leafy greens make up an important part of a healthy diet.