you may want to consult a naturopathic doctor to supplement your existing medical care - I found that it's a good way to boost your core health. Naturopaths are experts in  supplements (among other things) and should be able to give you some good pointers (you can read more about naturopathic doctors and other types of alternative treatments in one of my recent posts).  if you don't live in an area where you can find a licensed naturopathic doctor, go to a good, large health food store - there's a really good type of vitamin D that comes in droplet form where you put one drop on your hand once a day and lick it off. To read up more about vitamin D, see this post by Christine Miller.  still, I would check with the doctor that recommended folic acid to discuss what kind of dose that you should take.