The information comes from a study in the journal Pediatrics.
As a result, scientists say, not only should health providers monitor folic acid levels in teens, but the findings should influence school meals, school teaching and information given to parents.
Scientists say, it's known folate plays a critical role in brain development and brain function, but they add there is no scientific evidence that taking folate supplements will be beneficial.
Folic acid is naturally present in leafy green vegetables and legumes.
