By Megan Thielking
The FDA is expanding its investigation into how e-cigarette businesses might be illegally marketing their products. The FDA fired off letters to 21 e-cigarette companies — both manufacturers and importers — seeking information about about whether their products were on sale before August 8, 2016. That's the date when the FDA started requiring new or modified products to receive clearance before hitting the market. Meanwhile, leaders of more than two dozen urban health departments — from Austin to Boston — just sent a letter to FDA Commissioner Scott Gottlieb urging him to ban flavors in e-cigs and vapes.