With mainstream retailers Walgreens and CVS offering CBD skin products, it's easy to believe there must be something special about the trendy ingredient. But the claims are largely unproven, quality control standards don't exist and the legal status of CBD-infused food is in doubt. The U.S. Food and Drug Administration plans to hold a public hearing May 31 to gather more information on the science, manufacturing and sale of cannabis compounds such as CBD. A look at what we know as U.S. regulators work out what will and won't be allowed: WHAT IS CBD? CBD is one of more than 100 compounds found in marijuana. It's extracted using alcohol or carbon dioxide in factories and then added to...Keep on reading: Q&A: CBD Takes on the World of Retail, but Does It Work?