Sonia FriedmanAshley Koff, Registered Dietitian, is trained in all aspects of nutritional counseling. Educated at Duke and New York University, Ms. Koff trained in clinical dietetics at Los Angeles and USC County Hospital. She founded the Healthxchange nutritin counseling and consulting company in 2002. Currently, she sees patients privately and is on staff at Cedars-Sinai Medical Center in Los Angeles. Read More Read Less