The Food and Drug Administration is testing designs of a label that food manufacturers could voluntarily put on the front of packages indicating that a product is “healthy.” Why it matters: The effort is controversial, in part because the meaning of “healthy” continues to evolve. The FDA itself is in the process of updating its definition, which dates back to 1994. Other concerns are that such a label could be of dubious value, used too liberally by food makers, or […]