Iceberg lettuce
Iceberg lettuce.

Iceberg Lettuce is an annual plant of the daisy family Asteraceae.

It is most often grown as a leaf vegetable, but sometimes for its stem and seeds.

Lettuce was first cultivated by the ancient Egyptians who turned it from a weed, whose seeds were used to produce oil, into a food plant grown for its succulent leaves, in addition to its oil-rich seeds.

Lettuce spread to the Greeks and Romans, the latter of whom gave it the name lactuca, from which the English lettuce is ultimately derived.

By 50 AD, multiple types were described, and lettuce appeared often in medieval writings, including several herbals.

The 16th through 18th centuries saw the development of manyvarieties in Europe, and by the mid-18th century cultivars were described that can still be found in gardens.

Europe and North America originally dominated the market for lettuce, but by the late 20th century the consumption of lettuce had spread throughout the world.

GreenPoint’s Iceberg Lettuce take 200 acres out of cultivation and are commercialized from September to June.

Lettuce (butterhead)
Nutritional value per 100 g (3.5 oz)
Energy 55 kJ (13 kcal)
Carbohydrates
2.23 g
Sugars 0.94
Dietary fiber 1.1 g
Fat
0.22 g
Protein
1.35 g
Vitamins
Vitamin A equiv.

beta-carotene
lutein zeaxanthin
(21%)

166 μg

(18%)

1987 μg

1223 μg
Thiamine (B1)
(5%)

0.057 mg

Riboflavin (B2)
(5%)

0.062 mg

Pantothenic acid (B5)
(3%)

0.15 mg

Vitamin B6
(6%)

0.082 mg

Folate (B9)
(18%)

73 μg

Vitamin C
(4%)

3.7 mg

Vitamin E
(1%)

0.18 mg

Vitamin K
(97%)

102.3 μg

Minerals
Calcium
(4%)

35 mg

Iron
(10%)

1.24 mg

Magnesium
(4%)

13 mg

Manganese
(9%)

0.179 mg

Phosphorus
(5%)

33 mg

Potassium
(5%)

238 mg

Sodium
(0%)

5 mg

Zinc
(2%)

0.2 mg

Other constituents
Water 95.63 g

  • Units
  • μg = micrograms • mg = milligrams
  • IU = International units
Percentages are roughly approximated using US recommendations for adults.
Source: USDA Nutrient Database
Lettuce. (2016, September 25). In Wikipedia, The Free Encyclopedia. Retrieved 20:13, September 27, 2016, from https://en.wikipedia.org/w/index.php?title=Lettuce&oldid=741135996