Navy Rear Admiral Doctor Ronny Jackson, Trump’s military physician, announced Tuesday that the president’s overall health is “excellent” and he is medically fit to serve as commander-in-chief.

Jackson listed a range of tests the 71-year-old president underwent last week during his first periodic physical exam at Walter Reed National Military Medical Center.

“All clinical data indicates the president is healthy and that he will remain so for the duration of his presidency,” he said.

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Reporters at the press briefing could not believe the news, with one reporter asking how Trump could be considered healthy, despite his diet and lack of exercise.

“Tell me how a guy that eats McDonald’s hamburgers and fried chicken and all those diet cokes and never exercises is in as good of shape as you say he’s in,” one reporter asked.

“It’s called genetics. I don’t know, some people have just great genes,” Jackson answered.

“You know, I told the president that if he had a healthier diet over the last 20 years, he might live to be 200 years old.”

“He has incredibly good genes, and it’s just the way God made him,” Jackson added.

Many on social media did not believe Jackson’s assessment either, pointing to the fact that Trump’s family has a history of Alzheimer's.

However, others pointed out that many of Trump’s relatives lived well into their 80s and 90s.

Trump has repeatedly credited his genes for his success and intelligence.  

While much of Jackson’s assessment was positive, he did say that Trump could stand to lose about 10 to 15 pounds through diet and exercise over the next year.

“We talked about diet and exercise a lot. He's more enthusiastic about the diet part than the exercise part, but we’re going to do both,” Jackson said.

He said Trump currently “doesn't have a dedicated, defined exercise program,” but added the president’s diet has improved since he moved into the White House.

“He’s eating what the chefs are cooking for him now, and they’re cooking a much healthier diet for him now,” Jackson said. “And we’re going to continue to work on that and make that even healthier.”

However, many Twitter users even had a hard time believing Jackson when he said that Trump weighs 239 pounds.