Good Green Stuff contains Folate (methyltetrahydrofolate), the natural form of Folic Acid.Many people lack the ability to completely convert synthetic Folic Acid into Folate.
Also, those studies of the high carb / high protein diets also need to take into account high levels of syntheticfolicacid that is added to those refined carbohydrate foods — this is now well known to contribute to cancer and heart disease.