Store receipts
Though it’s second nature to crumple up a receipt and toss it in your purse or pocket, Will Bulsiewicz, MD, MSCI, board-certified gastroenterologist, warns against touching your proof of purchase. Many receipts are printed on thermal paper, which means they’re covered with a thin coating of powder that develops the dye needed for the type, he explains. “This powder contains BPA, an endocrine-disrupting chemical which has been linked to breast cancer, diabetes, and hormone abnormalities in children.”