American diets are in flux and if you’re throwing a dinner party, it can often be confusing trying to decide what to serve and to who. Being a vegetarian isn’t nearly as unusual as it once was: according to a study from Vegetarian Times, 3.2 percent of Americans are vegetarian, 0.5 percent is vegan, and 10 percent say they follow a largely vegetarian-inclined diet. But that’s just the tip of the iceberg. Where did those vegetables come from? Are they organic? Were they fair traded? Did the farm employ migrant workers? Did their transport create a large carbon footprint? Were they processed in an environmentally friendly way? Now people have such a long list of concerns and dietary restrictions that feeding more than 8 people can seem like hosting a United Nations picnic. Here’s a partial list of what you may confront at your next holiday dinner. Good luck!