#10: Collards
A cousin of cabbage and also a good source of calcium, collards provide 3842μg of beta-carotene per 100g serving. Cooked collards provide even more with 4814μg per 100g serving.
The Cultivar Group name Acephala ("without a head" in Greek) refers to the fact that this variety of B. oleracea does not have the usual close-knit core of leaves ("head") like cabbage. The plant is a biennial where winter frost occurs, perennial in even colder regions. It is also moderately sensitive to salinity. It has an upright stalk, often growing up to 2 feet tall. The plant is very similar to kale. Popular cultivars of collard greens include Georgia Southern, Morris Heading, Butter Collard (or couve-manteiga), and couve tronchuda.
Nutrition:
Widely considered to be healthy foods, collards are good sources of vitamin C and soluble fiber and contain multiple nutrients with potent anti-cancer properties, such as diindolylmethane and sulforaphane.[citation needed] Roughly a quarter pound (approx. 100 g) of cooked collards contains 46 calories.
Researchers at the University of California at Berkeley have recently discovered that 3,3'-Diindolylmethane in Brassica vegetables such as collard greens is a potent modulator of the innate immune response system with potent anti-viral, anti-bacterial and anti-cancer activity.[citation needed]
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