By Toni Gasparis
With so many options of Greek yogurt to buy in the grocery stores, it can be tricky to know which ones are the healthiest. So Dr. Oz and Mark Schatzker made it easy by testing out six popular Greek yogurt brands to see just how healthy they really are. Luckily, all six brands of both plain and fat-free yogurt passed the test with flying colors! Learn more about the brands to buy, here.