Pizza was originally invented in Naples, Italy, and the dish has since become popular in many parts of the world. An establishment that makes and sells pizzas is called a “pizzeria”. Many varieties of pizza exist worldwide, along with several dish variants based upon pizza. In 2009, upon Italy’s request, Neapolitan pizza was safeguarded in the European Union as a Traditional Specialty Guaranteed dish. Some mass produced pizzas by food chains have been criticized as having an unhealthy balance of ingredients. Some studies have linked consumption of the antioxidant lycopene, which exists in tomato products that are often used on pizza, as having a beneficial health effect.