Aging is a universal process of physiological decline and a major risk factor for non-communicable diseases such as cancer, cardiovascular, metabolic and neurodegenerative conditions. The pursuit of longevity is not new and has included ancient practices such as Ayurveda, Chinese medicine, Egyptian and Greek systems that emphasized changes in diet, exercise and social roles for a successful life. These practices were supposed to prolong life and maintain power. Today, regeneration and biological reversal in species such as the hydra and Turritopsis dohrnii, the so-called immortal jellyfish, are fueling debate about human repair and rejuvenation. It is important to distinguish between evidence-based longevity medicine and commercial wellness services without extensive research. Modern longevity medicine integrates science, lifestyle interventions, precision medicine, and artificial intelligence technology to address multiple disease pathways and prolong health.