This underrated green has excellent anti-inflammatory powers. "Arugula's potent anti-inflammatory power comes from a phytonutrient called erucin that inhibits pro-inflammatory substances, at least in animal studies," says Moon. "Arugula and its relatives in the Brassicaceae family (e.g., broccoli, cabbage, kale) are important parts of an anti-inflammatory eating pattern that protects against cognitive decline," she adds.