Dietary folate refers to the naturally occurring form of vitamin B9 found in foods. It is essential for good health and plays a crucial role in preventing birth defects, reducing risk of heart disease, stroke, and certain types of cancer. Dietary sources include dark leafy greens like spinach, asparagus, broccoli, Brussels sprouts, beans, lentils, peas, oranges, bananas, whole grains, nuts, and seeds.