Folate deficiency occurs when the body does not get enough folate, a B-vitamin essential for cell division and the production of DNA. This deficiency can lead to various health issues, including anemia, fatigue, and complications during pregnancy, such as neural tube defects in developing babies. Common causes of folate deficiency include inadequate dietary intake, certain medical conditions, and the use of specific medications that interfere with folate absorption. Foods rich in folate include leafy greens, legumes, and fortified cereals, making it important to maintain a balanced diet to prevent this deficiency.