Folate / Folic acid also called vitamin B9 is important for red blood cell formation & for healthy functioning of your body. It is crucial during early pregnancy to reduce the risk of birth defects of brain & spine in the fetus. Folate is found mainly in green leafy vegetables, beans, peas & nuts. Fruits rich in folates are oranges, lemons, bananas, melons & strawberries. Folate deficiency can occur if you are dieting, not eating foods rich in folate, you suffer from Celiac disease & malabsorption. This test measures the level of folate in your blood. The levels measured can be affected by your diet.