The Navy doctor exhausted reporters' questions during an unusually lengthy hour-long session, at Trump's request, and said he did not withhold any information in the interests of privacy. "He's very sharp. He's very articulate when he speaks to me". He is fit for duty. "I can't believe Donald Trump eats McDonalds and drinks Diet Coke all day everyday & is healthy".
He said the brief test is not normally administered to presidents, but that Trump, 71, wanted to clear up public questions about his cognitive abilities.
Trump took office at age 70, making him the oldest incoming US president.
In a statement on Tuesday, Jackson detailed the results of Trump's health examination.
The irony of the Trump administration pointing to a test devised by an immigrant was not lost on Nasreddine, whose family came to Canada during Lebanon's civil war. "What can I tell you?"
The president's resting heart rate is 68 and blood pressure is 122/74. His "bad" cholesterol or LDL is 143; a score of below 100 is recommended. Abstract thought is then tested by the doctor, who asks the subject to explain what a specific pair of words have in common.
Like most doctors and patients, they had the conversation about losing weight and eating better.
Jackson told reporters on Tuesday that he and Trump "talked diet and exercise a lot".
He described Trump's health as "excellent", but added that like the majority of Americans, the President "is overweight and he doesn't get enough exercise". It is not and Dr. Jackson confirmed as such.
"It's called genetics", Dr. Jackson said.
The physician said that while he himself gets drained after overseas travel, the President has tremendous stamina and manages with four-to-five hours of sleep. Some people have just great genes.
Currently, Jackson added, Trump "doesn't have a dedicated, defined exercise program".
"There's a gym upstairs and we'll get that set up to his specifications and we'll see how that goes".