U. S. regulators warned a leading marijuana company for making unproven health claims about CBD, the trendy ingredient that's turning up in lotions, foods and pet treats. The Food and Drug Administration announced Tuesday it warned Curaleaf Inc. , of Wakefield, Massachusetts, for illegally selling unapproved products. Curaleaf's claims could lead people to delay medical care for serious conditions like cancer, the agency said. "Consumers should beware of purchasing or using any such products,"...