excerpt from the Florida Food Fair site:
Broccoli is an excellent source of vitamins A and C and also riboflavin, calcium and iron. One cup of chopped broccoli contains approximately 24.6 calories, 2.6 g dietary fiber, 42 mg
calcium, 286 mg
potassium and no cholesterol. It also yields 82 mg
vitamin C, 62 mcg folate, 1356.9 IU vitamin A
Any other reason why people might warn against feeding this....possibly pesticides?
I would expect that a thorough washing first would cure this problem, if there was a problem with it.