In terms of the metabolic absorption of folic acid tablets, it is possible to take folic acid at any time of the day, and it is recommended that it should be taken one hour after dinner. Since folic acid is stimulating to the gastrointestinal tract, women with poor gastrointestinal function may easily suffer from nausea and vomiting after taking it, so it is recommended to take it after breakfast or one hour after dinner. Considering work and going out, it is best to take it after dinner to avoid forgetting to take it in the morning in a hurry. The best time to start taking it is from the first trimester of pregnancy preparation. It takes about 1-2 months for the lack of folic acid in the body to be replenished to normal level, and if the supplementation is started after pregnancy, it may weaken the effect of folic acid tablets in preventing fetal neural tube malformation.