How long before trying to get pregnant is the best time to start taking folic acid? As people pay more attention to nutrition during pregnancy, the importance of folic acid is gradually recognized by the public. However, many people hold a wait-and-see attitude or don\’t pay attention to the \”Dietary Guidelines for Chinese Residents\” recommendation to start taking folic acid at least 3 months before preparing for pregnancy. So, how long before you want to get pregnant should you start eating leaves?