Republican presidential candidate Donald Trump eats a pork chop on a stick while attending the Iowa State Fair on Aug. 15, 2015 in Des Moines. Getty Images

Running for president involves more than shaking hands and kissing babies — candidates also find themselves eating a lot, sampling local cuisine as they try to bond with voters in various states. But now that Donald Trump is firmly installed in the White House, he may have started cleaning up his habits.

Steve Mnuchin, the secretary of the treasury, told attendees at an Axios event Friday that the president doesn't eat fast food from KFC and McDonald's anymore. He added that the offerings at the White House were "great," then mentioned that Trump's genes were "perfect."

"[Trump] has incredible energy, and he's unbelievably healthy," Mnuchin said, according to Axios.

Read: 8 Times Politicians Became Memes When They Messed Up Eating

Trump's diet has been a subject of fascination for voters and pundits alike in recent months, with rumors and social media providing periodic clues into what the tycoon eats. We now know that Trump doesn't like breakfast, avoids Oreos and chugs Diet Coke. Last May, he posted an Instagram photos of himself eating a McDonald's — French fries and a Big Mac, plus four packets of ketchup — and in August, he got widely mocked online for a Twitter picture that showed him digging into a KFC meal with a fork and knife. While his predecessor, President Barack Obama, used to snack on almonds and apples in the White House, Trump has stocked up on potato chips.

Recently, however, he's begun eating better.

"The steak-and-potatoes narrative is true," a source told Axios last month. "But he also really likes fish and seafood — so, like crab and shrimp. Things like that. He does eat salad. He'll eat like Cobb salad … He eats vegetables."

Nutrition aside, the 70-year-old president has several people defending his wellness. Not only did Mnuchin rave about Trump's DNA on Friday, but during the campaign, Trump's doctor said he would be "the healthiest individual ever elected to the presidency."