Limes are a citrus fruit often used to accent flavors in foods and are a common ingredient in Mexican, Vietnamese and Thai cuisine. They are grown year-round in tropical climates and are usually smaller and less sour than lemons. The Tahitian lime, also called the Persian lime, is the variety most commonly used in cooking. Key limes are smaller, rounder and more acidic than Tahitian limes and are used in the classic dessert Key Lime pie. It is a misconception that key limes are grown in Key West, FL. They are primarily grown in subtropical climates such as Mexico, India and Egypt.1 This MNT Knowledge Center feature is part of a collection of articles on the health benefits of popular foods. It provides a nutritional breakdown of limes and an in-depth look at its possible health benefits, how to incorporate more limes into your diet and any potential health risks of consuming limes.