Folic acid 5mg is used for preventing and treating low blood levels of folate (folate deficiency) and high blood levels of homocysteine (hyperhomocysteinemia) . It is also used to prevent serious birth defects such as spina bifida in pregnant women. Folic acid is used to treat or prevent folate deficiency anemia. The usual dose for adults and children over 1 year old is 5mg, taken once a day. If you have a higher chance of having a baby with a neural tube defect, your doctor will recommend an increased dose of 5mg, taken once a day. Folic acid is also used for many other conditions including depression, stroke, decline in memory and thinking skills, and many others.