FORT WASHINGTON, Pa.--(BUSINESS WIRE)--Nutrisystem, Inc. (NASDAQ: NTRI), a leading provider of weight management products and services, today reported that the Company exceeded its previously provided revenue, adjusted EBITDA, and earnings per share guidance for the second quarter 2015 and is raising its previously provided guidance for the full year. Dawn Zier, President and Chief Executive Officer, stated, “Continued momentum and new initiatives resulted in top-line growth of 17% and our eigh