'Howard Tucker, the world's oldest doctor, left us the three keys to longevity: "You must have a purpose"'
The American neurologist died in December 2025
Howard Tucker held the Guinness record for the world's oldest practicing physician. The American neurologist died in December 2025 at the age of 103 , but he left us with the great biological and emotional secret to a long life. " Retirement is the enemy of longevity . You must have a purpose in life , get up in the morning, and know who you are," the physician said in an interview with Today.
Having a clear goal in your day-to-day life means, according to the doctor, that you stay connected and prevents your mind from retiring . In addition to this general reflection, in an essay written for CNBC shortly before his death and published with his family's permission, Howard Tucker shared the three keys that, according to him, are essential to having a long and fulfilling life. His three pieces of advice go beyond diet or exercise and are lessons on how to face our existence.
The three keys to Howard Tucker's longevity
The first key to maintaining longevity, according to the essay by neurologist Howard Tucker , is to keep the mind occupied. In short, to avoid mental retirement. "The mind is like any other muscle in the body. If it is not used, it weakens," he explained. The doctor argued that keeping the brain active does not necessarily have to involve a job. "It can mean volunteering, reading, learning a skill, playing music, joining a club...", he wrote for CNBC.
The second great lesson the American physician left us is to avoid hatred. "Your attitude toward life matters (...). I've been here a long time. Like everyone else, I experience disappointment, loss, and injustice. But I never think it makes sense to carry hatred," Howard Tucker confessed. The neurologist argued that harboring negative feelings consumes energy and affects us emotionally and physically. "The important thing is not to let resentment dominate your life" , the specialist concluded.
The third and final piece of advice is to make the most of life. Enjoy it. Although in moderation: " For me, moderation is what allows you to enjoy things in the long term . Have a sensible attitude toward what you eat. The same applies in many aspects of life. Too much of anything can wear you out, just like too little." Howard Tucker urged his readers to enjoy life to the fullest, with common sense, control, and purpose. That is how he reached 103 years of age and became a medical reference in the field of longevity.
