text:  The Food and Drug Administration, which regulates period products, said it's reviewing the study and will take any needed action to safeguard consumers. Bobbi Wilding of the advocacy group Clean and Healthy in New York says there need to be more stringent rules for menstrual products and the businesses that make them. Companies have to show that they don't cause problems like bacterial growth or changes in the mucus in the vagina. But there are no requirements at the FDA level that...