During a January 4 press conference, White House spokesperson Sarah Huckabee Sanders called the suggestion that the president had mental health issues "disgraceful and laughable".
Trump has said he sleeps only four to five hours a night, another element of his lifestyle that Jackson remarked upon. In a remarkable show of transparency for an administration known for its secret-keeping, Jackson stood at the White House podium for an hour Tuesday answering questions about the President's health.
Keen to put an end to rumours about his mental health, which peaked when he appeared to slur his words as he announced that the USA would recognise Jerusalem as Israel's capital last month, the 71-year-old asked Dr Ronny Jackson to carry out the assessment and scored a ideal 30/30.
Trump is now taking several types of daily medication, Jackson wrote, including aspirin; Rosuvastatin to lower cholesterol; Finasteride to aid in the prevention of male pattern hair loss; Ivermectin to treat rosaccea when needed; and a multivitamin product. But Jackson said Trump personally requested the test as he continues to face questions about his mental acuity for office.
Trump's body mass index, or BMI, of 29.9 puts him in the category of being overweight for his height.
Despite acknowledging that Jackson performed an echocardiogram and stress test and the results were "no cause of concern" over Trump's heart, Gupta gave his own diagnosis.
Despite the diet and cholesterol concerns, Jackson stressed that Trump's "cardiac health is excellent".
That could be due to two factors, Jackson said.
Nasreddine says he designed it as a way to quickly assess, within 10 or 12 minutes, whether someone has suffered light cognitive impairment or the onset of Alzheimer's disease; he says it's now been used in 200 countries in 60 languages. "He is taking a cholesterol-lowering medication, he has evidence of heart disease, and he's borderline obese", Gupta pointed out, citing Jackson's own findings.
The results come amid questions about Mr Trump's mental fitness for office.
Of course this may not surprise Trump himself, who is self-described as a "very stable genius".
His blood pressure was 122/74, within normal bounds, and his cholesterol was on the high side, Dr Jackson said. "If you're anxious about mental illness, it has to be a psychiatric exam with a psychiatrist", he told CTV.
Presidents don't typically sit for cognitive assessments during their periodic physical exams.