'It's an embarrassing fact, but more than half of dieticians think folic acid is naturally found in foods. It isn't and never was. Only folate is found in foods such as lentils, beans, spinach and other greens.
The body does not metabolize folic acid in the same way it does folate. Researchers from the Institute of Food Research and Newcastle University have confirmed that the body processes synthetically-produced folic acid differently to the natural counterpart found in vegetables.
This leads to unmetabolized folic acid circulating in the bloodstream which is eventually metabolized by the liver, but the process is slow, inefficient and possibly toxic.'