Folic Acid side effects, What is folic acid b12 used for About Essence-In-Use › Forums › Essence-In-Use › Folic Acid side effects, What is folic acid b12 used for This topic has 0 replies, 1 voice, and was last updated 5 years ago by ronald. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In