Food and Drug Administration Commissioner Marty Makary is stepping down after a turbulent 13-month term marked by organizational upheaval, controversies over drug approvals and tensions with the White House. Kyle Diamantas, the agency's deputy commissioner for food, will serve as acting commissioner, according to sources familiar. Why it matters: Under Makary, FDA became the unexpected source of drama and a lightning rod for Health Secretary Robert F. Kennedy Jr.'s broader efforts to upend hea