 [ Symptoms ] am i more vulnerable to catching a cancer if i currently have the flu [ Disease ] foods that are rich in folic acid include leafy green vegetables like spinach cereals fortified with folic acid lentils and avocados while it is great that you want to eat more foods that are rich in folic acid i and most pregnancy experts recommend that you take a folic acid supplement to help prevent birth defects you want to be absolutely sure you are getting enough folic acid which is why many women start taking prenatal vitamins before they get pregnant you do not want to wait until you get pregnant to start loading up on folic acid because it is particularly important during the very early stages of pregnancy