A new study suggests that folic acid can improve brain function in the elderly.

Researchers found that men and women between 50 and 70 showed better brain function while taking folic acid when compared to someone 5 years younger.

"We have shown that three-year folic acid supplementation improves performance on tests that measure information processing speed and memory, domains that are known to decline with age.

"Trials similar to our own should be repeated in other populations to provide greater insight into the clinical relevance of folic acid supplementation, such as in populations with mild cognitive impairment and dementia."

Although there seems to be significant benefits to taking a folic acid supplement, experts warn that folic acid can be dangerous as it can promote a vitamin B12 deficiency in older people.

The study was published in the latest issue of the journal Lancet