Natural Factors Folic Acid - 1 mg - Considered a "brain food", Folic Acid is required for energy production and the formulation of red blood cells. Maintaining proper levels of Folic Acid before and during pregnancy is very important, as it helps regulate embryonic and fetal nerve cell formation, which is vital for normal fetal development, and it may also help reduce the risk of premature birth and birth defects, such as spina bifida and anencephaly. Possible signs of Folic Acid deficiency include anemia, apathy, fatigue, a sore red tongue, memory problems, paranoia, canker sores and weakness. Working best in conjunction with Vitamin B12 and Vitamin C.