BENTONVILLE, Ark.--(BUSINESS WIRE)--As springtime approaches, there is no doubt that many Americans continue to experience one of the more painfully cold winters this year, which has affected the health of many. According to a study at Johns Hopkins University1, cholesterol levels fluctuate seasonally, but are at their worst during the cold winter months. To help people resume their healthy habits with renewed vigor and excitement for warmer weather ahead, Sam’s Club is offering free health scr