Vitamin B9, also known as folate or folic acid, is a water-soluble vitamin that plays a crucial role in cell division and the production of DNA. It is essential for the growth and development of tissues, making it particularly important during periods of rapid growth, such as pregnancy and infancy. This vitamin is found in various foods, including leafy green vegetables, legumes, nuts, and fortified cereals. Adequate intake of Vitamin B9 helps prevent neural tube defects in developing fetuses and supports overall health by contributing to the formation of red blood cells.