B9, also known as folate, 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 pregnancy for fetal development. Folate is found naturally in various foods, including leafy greens, legumes, and citrus fruits. A deficiency in folate can lead to health issues such as anemia and increased risk of neural tube defects in newborns. To ensure adequate intake, many countries fortify certain foods, like cereals, with synthetic folic acid, the man-made form of folate.