No Italy without tomatoes, no Ireland without potatoes, no Switzerland without chocolate. Ten foods the world thinks are theirs — all from the Americas.

Toxic Food 1: Refined Carbohydrates Are grain-based foods that have been heavily processed, making them less nutritious but more appealing. Common examples include bread, crackers, cereal, pasta, pretzels, rice cakes, and granola bars. These foods quickly convert to sugar (glucose) in the bloodstream, giving them a...