Broccoli has been around for more than 2000 years, The name "broccoli" comes for the Latin word brachium, which means "branch," or "arm." Americans have grown it in their gardens for only about 200 years! The first commercially grown broccoli was grown and harvested in New York, then planted in the 1920's in California.
Source: http://www.fruitsandveggiesmatter.gov/month/broccoli.html
Fresh vs. Frozen - FRESH IS BETTER
Packaged frozen broccoli differs from fresh in its nutrient content. The flower buds or florets are richer in beta-carotene than the stalks. Manufactures typically cut off most of the stalk before packaging it, so frozen broccoli may contain 35% more beta-carotene by weight than fresh broccoli. The downside is that frozen broccoli has twice as much sodium as fresh (up to 68 mg per 10 oz. package), about half the calcium, and smaller amounts of iron, thiamin, riboflavin, and vitamin C.
The best way to cook broccoli is to steam, cook in the microwave or stir-fry with a little broth or water. These methods are better than boiling. Some of the vitamin and mineral content are lost from the vegetable and end up in the cooking water when they are boiled.
A high intake of broccoli has been found to reduce the risk of aggressive prostate cancer. Broccoli consumption has also been shown to be beneficial in the prevention of heart disease
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