FOXO transcription factors are a group of proteins that act as transcription factors, meaning they help control the activity of specific genes within cells. In dogs, these factors are involved in various cellular processes, including metabolism, cell cycle regulation, and response to oxidative stress. By influencing these processes, FOXO transcription factors contribute to the overall health and longevity of canine cells, promoting resilience against age-related decline and diseases. Research in geroscience suggests that enhancing the activity of FOXO transcription factors may play a significant role in extending lifespan and improving healthspan—the period during which a dog remains healthy and active. For example, studies have indicated that these factors may help protect against cellular damage caused by aging and environmental stressors, thereby supporting better health as dogs grow older. Understanding the function and regulation of FOXO transcription factors opens up exciting possibilities for developing therapeutic strategies aimed at promoting longevity in our canine companions.