Health secretary Robert F. Kennedy Jr. fired the starting gun in a challenge to the food industry on Sunday, announcing on CBS’ “60 Minutes” that he plans to act on a plan outlined by former Food and Drug Administration chief David Kessler to overhaul ultra-processed foods.

“We will act on David Kessler’s petition,” Kennedy said on “60 Minutes.” “And the questions that he’s asking are questions that FDA should’ve been asking a long, long time ago.” 

It’s not yet clear when Kennedy will release his formal response to the citizen petition filed by Kessler, or what the letter will say. That leaves many of the details of his plans uncertain, including the timeline.