Forget chocolate-fueled endorphin rushes and bread-propelled serotonin spikes. When it comes to using food to tweak your brain chemistry for lasting happiness, do what the French do: Reach for fruit, vegetables, and fat. No, not buttery croissants slathered with boysenberry jam or hunks of Camem bert. And certainly nothing from to fast food—especially not pommes frites. For the happiest eaters in a brand- new study from France’s National Institute of Health and Medical Re search, produce, fish, and healthy oils were the recipe for joy—a finding from the more than 12,000 women and men whose eating habits researchers fol lowed for a decade.