Intolerance to specific foods, which would suggest that the body has some difficulty digesting such foods, is one common mechanism that causes nausea. Within a few hours of eating or drinking that type of meal, nausea is frequently experienced, and some of these foods-like milk and other dairy products-contain lactose. Others include foods like cabbage that contribute to the buildup of intestinal gas. The other factors are related to food allergies, which can occur when a food contains proteins that the body misinterprets as a threat and reacts to by launching an immune reaction. Purchase this influential book to learn more about nausea and its other causes of it.