The folic acis is in prenatal vitamins. i take one with the dha as well. Foods you eat has it in them as well.
Nuts, seeds, broccoli, kale, spinach, lentils, avacados
I take a prenatal vitamin recommend by my dr.. you can find them at any store.. walmart Walgreens etc
I take 2 (400mcg) pills and a DHA pill
Some breakfast cereals are fortified with folic acid. There are also folic acid supplements available if you don't think you get enough from your diet.
You can find folic acid in leafy greens, citrus fruit, beans and whole grains. Also in your prenatal vitamins