FOXO3 (Forkhead Box O3): FOXO3 is a transcription factor that plays a crucial role in regulating genes involved in cell cycle arrest, DNA repair, and apoptosis. It is a significant factor in the study of longevity and age-related diseases, influencing pathways that impact the ageing process. In ageing research, FOXO3 stands out as a key element, with scientists striving to understand its role in the complex mechanisms of life and ageing.