Folic acid is fine to take at night with no additional benefits.
Folic acid needs to be supplemented in the first trimester of pregnancy and the first trimester after pregnancy, 0.4mg of a folic acid tablet, one tablet a day, to prevent neural tube malformations in the fetus. There is no better time to take folic acid, it is usually taken half an hour after a meal to avoid gastrointestinal discomfort. Whether you take it in the morning, noon, or at night is fine, there is no set time.
However, if a time is determined, it will be taken at that time in the future, so as not to miss the dose.
During pregnancy, you should take folic acid regularly, and you can also eat some green leafy vegetables to supplement folic acid from food, and at the same time pay attention to balanced nutrition and light diet.