US President Donald Trump scored 30 out of 30 on a cognitive impairment test as he tries to lay questions about his mental health to rest.
Donald Trump insisted on a cognitive test during his first physical as president and had a perfect score, White House Doctor Ronny Jackson said.
Trump is "fit for duty" but he needs to improve his diet and add exercise to his lifestyle, said Jackson, a US Navy admiral.
Trump scored 30 out of 30 points on the Montreal Cognitive Assessment, a quick, one-page screening examination for cognitive impairments.
"The president is mentally very sharp, very intact," Jackson said.
Trump's scheduled annual physical was Friday, a week after publication of Fire and Fury: Inside the Trump White House, in which author Michael Wolff portrayed the president as intellectually and emotionally unfit for the presidency. Trump in response described himself as a "stable genius."
There was no psychiatric examination during last week's physical, Jackson said.
Trump, who stands 190.5 centimetres, weighed 108.4 kilograms, 1.4kgs more than when he released personal medical data as a presidential candidate in September 2016.
Trump already takes 10 milligrams daily of Crestor, a cholesterol-lowering medication, which Jackson said he plans to increase.
The president's daily regimen includes low-dose aspirin of 81 milligrams, a 1-milligram pill of Propecia against male-pattern baldness and a multivitamin.
"The president's overall health is excellent," Jackson said. "His cardiac performance during his physical exam was very good. He continues to enjoy the significant long-term cardiac and overall health benefits that come from a lifetime of abstinence from tobacco and alcohol."
He expressed a goal for Trump to lose up to 6.8 kilograms - by next year through the "lifestyle" improvements of a reduced-calorie diet and more regular exercise.
"He's more enthusiastic about the diet part than the exercise part," Jackson said.
"If we get diet and exercise right, then weight loss will come."
He said that Trump does not always follow doctor's orders, but that White House physicians have ways to exert leverage: "He's just like every other president I've treated. On occasion I have to get the first lady involved."