One of the oldest cheeses in the world, feta is still resoundingly popular, thanks to its mild flavor and distinct crumbly texture. It's low lactose content also makes it a great option for with sensitive stomachs.

Antibiotics have been used for thousands of years, scientists have found evidence of their use in ancient Roman and African civilizations. The use of antibiotics is especially prevalent in traditional medicinal practices, such as Chinese medicine where they have uses plants and plant extracts containing antimicrobials for thousands of years.

You can find sushi at that little inexpensive restaurant down the street as well as that elegant 5 star Japanese restaurant. Sushi has become extremely popular and most people are familiar with it. However, few people actually know anything about sushi traditions, how many calories it has and how healthy it is. EAT SMARTER gives you Sushi 101.