Researchers have found that molecules in vegetables like broccoli or cauliflower help to maintain a healthy barrier in the lung and ease infection. The AHR—aryl hydrocarbon receptor—is a protein found at barrier sites like the gut and the lung. Natural molecules in cruciferous vegetables—for example, kale, cauliflower, broccoli, or cabbage—are dietary 'ligands' for AHR, which means, once eaten, they activate AHR. This research now shows that AHR is highly active in endothelial cells lining blood vessels in the lung. The researchers conducted a series of experiments in mice to show how AHR impacts lung barriers. When mice were infected with...