It's universally known that broccoli, kale, Brussels sprouts, cauliflower, and all cruciferous vegetables (also known as brassicas) are good for you—but you probably don't know exactly how good they really are. A recent study by Johns Hopkins University and the University of Pittsburgh School of Medicine show that cruciferous veggies like broccoli and kale can actually clear air pollutants from your body. A 1999 study shows an 'inverse association' between brassica consumption and cancer. In other words: the more brassicas people eat, the less cancer they tend to have. However, many people