Food trends are funny. Sure, the foods that gain the spotlight aren't "new." Take kale or açai, for example—they’ve been consumed for centuries. But as we learn more about the multitude of health benefits they provide, they're suddenly what every blogger, nutritionist, and celebrity is eating. Next, restaurants follow suit, and these latest “it” ingredients end up on the menu at every hotspot in town, prepared every which way from Sunday. In social media terms, the foods basically go viral.