NEWTON-Lipid profile testing, and a discussion of cholesterol and lipids, is being offered at Barn Hill Care Center, 249 High Street, Newton. Sponsored by Newton Memorial Hospital, the class will attempt to answer these questions: How does cholesterol cause heart disease? What does a cholesterol level mean? What the difference is between high density lipids (HDL) and low density lipids (LDL)? What do the differences mean? The screening will be held on Thursday, July 28, from 7 a.m. to 10 a.m. Information about cholesterol and a lipid profile will be available at no charge.