B9
Vitamin B9 (C19H19N7O6: aka folic acid) is essential for numerous cellular functions, especially cell growth, DNA synthesis and maintenance, and red blood cell production.
Folate is naturally occurring B9, whereas folic acid is the synthesized (vitamin pill) form.
Abundant B9 is found in various vegetables, particularly dark green leafy vegetables, fruits, nuts, beans, lentils, and peas. Foods especially high in folate include black-eyed peas, lentils, spinach, asparagus, lettuce, broccoli, oranges, and tropical fruits such as mango.