Having a tense day? Enjoy a bowl of whole grain cereal mixed with skim milk — or drink a glass straight up. Turns out special proteins found in milk may help ease anxiety and boost mood by lowering blood pressure and increasing serotonin activity in the brain. To really get your zen on, sip a mug of my Dark Chocolate Hot Cocoa during an unsettling afternoon. It combines two stress-relieving ingredients — dark chocolate and skim milk — in one deliciously rich drink.