By Sharon Begley NEW YORK (Reuters) – A long-running and well-respected workplace wellness program at PepsiCo that encourages employees to adopt healthier habits has not reduced healthcare costs, according to the most comprehensive evaluation of a such a program ever published. Released on Monday in the journal Health Affairs and based on data for thousands of PepsiCo employees over seven years, the findings “cast doubt on the widely held belief” that workplace wellness programs save employers significantly more than they cost, conclude Soeren Mattke of the RAND Corporation and his co-authors. “Blanket claims of ‘wellness saves money’ are not warranted.” Workplace wellness programs, a $6 billion-a-year industry, are a favorite of the business community because they promise to improve productivity, cut absenteeism and reduce medical costs by averting expensive illnesses. They aim, for instance, to help employees quit smoking, maintain a healthy weight and have regular screenings for elevated cholesterol, high blood pressure, cancer and other conditions, all of which are supposed to reduce healthcare spending.