Last summer, while I was studying in Greece, a quick trip to the grocery store turned into a 10-minute staring contest with a granola bar box. It wasn't the language or the kilogjles that tripped me up, but the bright green digestive bar stamped across the front. I kept asking myself what that could mean or why someone might need that, which are ironically the exact same questions I asked myself during grocery trips freshman year.Being an informed buyer means facing marketed nutrition labels like these. Lab ...