Folic acid or vitamin B9 is one of the essential vitamins needed by your body. It plays a significant role in many bodily functions such as DNA synthesis, cell repair and amino acid metabolism. Adequate levels of folic acid in your body are also essential for the normal functioning of the brain. According to studies, it reduces depression and the risk of dementia. Also, it keeps your healthy and helps prevent the risk of various health complications like stroke, heart diseases and coronary diseases. Folic acid is also popular for preventing hair loss. It strengthens hair follicles and their cells, allowing them to function properly. Therefore make sure you get enough folic acid from foods like dark green leafy vegetables, brown rice, lemon, banana, lentils and brown rice.