His increasingly unhealthy diet even made him suffer from an extreme case of constipation.

The autopsy later revealed that he had “four months worth of compacted stool” sitting in his bowel.

Chief investigator for the Tennessee Office of the State Chief Medical Examiner, Dan Warlick, explained this led to Elvis’ death.

He said: “Presley’s chronic constipation – the result of years of prescription drug abuse and high-fat, high-cholesterol gorging – brought on what’s known as Valsalva’s maneuver.

“Put simply, the strain of attempting to defecate compressed the singer’s abdominal aorta, shutting down his heart.”