3 Powerful secrets for longevity: At 103, the World’s Oldest Doctor shared surprisingly simple rules for healthy aging

Dr. Howard Tucker, a Cleveland neurologist recognized as the world’s oldest doctor, believed longevity comes from staying mentally active, emotionally balanced, and living in moderation. Before his death at 103 in December 2025, Tucker shared lessons from his long career and personal life, emphasizing curiosity and purpose over strict health trends. His philosophy focused on enjoying life responsibly while maintaining meaningful relationships, intellectual activity, and a positive mindset.