FOXK1 (Forkhead Box K1) is a transcription factor belonging to the forkhead box (FOX) family, characterized by a unique DNA-binding domain called the forkhead box. FOXK1 plays an essential role in controlling gene expression related to cell growth, proliferation, differentiation, and longevity. It is especially important in muscle development and regeneration, as well as in regulating metabolic functions. Due to its involvement in these critical processes, FOXK1 is also studied for its role in various diseases, including cancer.