Texting to track your calories may help peel off pounds. College students who used cell phones to monitor calories and physical activity and received personalized feedback about how they were doing dropped significantly more weight than those who didn't, according to new research from Temple's Center for Obesity Research and Education (CORE). "Cellphones are a powerful intervention tool for weight loss," said lead author Melissa Napolitano. CORE Director Gary Foster says dieters often say they need to be held accountable. Text messaging "tries to replicate the interaction with a health care professional," he said. "There is someone on the other end."