Vascular Endothelial Growth Factor (VEGF) is a protein that plays a crucial role in the formation of blood vessels, a process known as angiogenesis. It is produced by various cells in the body and stimulates the growth of new blood vessels from existing ones, which is essential for healing wounds and supporting tissue growth. VEGF is also important in various physiological processes, including the development of the embryo and the response to low oxygen levels in tissues. Abnormal levels of VEGF are associated with several diseases, including cancer, where excessive blood vessel growth can support tumor growth and spread.