In February 2024, the world was stunned when Buckingham Palace announced that King Charles III had been diagnosed with cancer. After a brief absence, he made a surprising return to a packed royal schedule, leaving many wondering: how does he manage to carry on as king under such circumstances?

Most recently, on May 27, 2025, King Charles embarked on a historic trip to Canada—his first visit since ascending the throne in 2022. Alongside Queen Camilla, he opened the 45th Canadian Parliament, marking only the second time a British monarch has delivered a speech there, following Queen Elizabeth in 1957. But what enables him to maintain such peak performance?

A senior royal aide revealed to BBC: “I genuinely don’t see any difference in the King. Medical science has made incredible advances, and he’s following the doctors’ advice: live as normal a life as possible.”

In March 2025, King Charles was admitted to the London Clinic for monitoring due to temporary side effects from his ongoing cancer treatment. While no specific details about his condition were shared, Buckingham Palace confirmed he is recovering positively. “It’s just a minor bump on the right path,” a royal source stated at the time.