Folic acid supplementation is an important means to prevent fetal neural tube defects. Generally speaking, you should pay attention to supplementing folic acid during pregnancy preparation. Experts suggest that it is best to start taking folic acid tablets 3 months before pregnancy. You should know that 3 months after pregnancy, the optimal daily intake is 0.4 mg. Many couples of childbearing age know that folic acid supplementation for pregnant women can prevent fetal neural tube defects. So, when is the best time to take folic acid tablets? Do you know if it is useful to take folic acid tablets after pregnancy? What brand of folic acid tablets is best? Nowadays, many families can only have one child.