Nutritional Profile Broccoli is an excellent source of vitamin K, vitamin C, chromium and folate. It is a very good source of dietary fiber, pantothenic acid, vitamin B6, vitamin E, manganese, phosphorus, choline, vitamin B1, vitamin A (in the form of carotenoids), potassium and copper. Broccoli is also a good source of vitamin B1, magnesium, omega-3 fatty acids, protein, zinc, calcium, iron, niacin and selenium. Broccoli is also concentrated in phytonutrients. In one particular phytonutrient category—glucosinolates—broccoli is simply outstanding. The isothiocyanates (ITCs) made from broccoli's glucosinolates are one of the keys to broccoli's cancer-preventive benefits.

What is meant by the term "goitrogen" and what is the connection between goitrogens, food, and health? "Goitrogen" is a medical term that is used to describe any substance that interferes with function of the thyroid gland. The word itself comes from "goiter," which means enlargement of the thyroid. If its ability to produce thyroid hormones becomes impaired, the thyroid gland can grow in size in an effort to keep up with the body's need for thyroid hormones.