dunno if it has been said, but lettuce has no nutritional value.
The nutritional value of lettuce varies with the variety. Lettuce in general provides small amounts of dietary fiber, some carbohydrates, a little protein and a trace of fat. Its most important nutrients are vitamin A and potassium. The vitamin A comes from beta carotene, whose yellow-orange is hidden by green chlorophyll pigments. Beta carotene, of course, is converted to vitamin A in the human body. The darker green, the more beta carotene.
According to the American Cancer Institute and the American Cancer Society, foods rich in vitamin A and C (antioxidants) offer protection against some forms of cancer. Along with other phytochemical, antioxidants reduce the risk of cancer of the respiratory system and intestinal tract.
Lettuce, except iceberg, is also a moderately good source of vitamin C, calcium, iron and copper. The spine and ribs provide dietary fiber, while vitamins and minerals are concentrated in the delicate leaf portion.
Nutrition Facts (One cup raw leaf lettuce, chopped)
Calories 9
Dietary Fiber 1.3
Protein 1 gram
Carbohydrates 1.34 grams
Vitamin A 1456 IU
Vitamin C 13.44
Calcium 20.16
Iron 0.62
Potassium 162.4 mg
orly ?
All aboard for the pwntwag0n !