Folate metabolism is examined mainly by blood tests. The folic acid metabolism test is mainly to detect whether the intake of folic acid is insufficient and whether genetic defects lead to low folic acid utilization ability, so as to prepare for eugenics. The metabolizing ability of folic acid is related to its own genes. It is generally recommended to take appropriate folic acid supplements from early to late pregnancy to effectively prevent fetal neural tube development malformations. In addition, the folic acid metabolism test only requires taking some blood for testing. Fasting is required to ensure the accuracy of the test results. If you are not deficient in folic acid after the folic acid metabolism test, do not blindly supplement, so as to avoid oversupplementation leading to adverse effects on the body, such as nausea, vomiting, loss of appetite and other symptoms. If the folic acid metabolism is poor and assessed as high risk, you can take folic acid supplementation drugs, such as folic acid tablets, in moderation as prescribed by your doctor to avoid folic acid poisoning.