It takes about six weeks for folic acid to bring levels down. Vitamins B 12 and B 6 can also help. Much higher doses may be needed in people with end-stage kidney disease. In 1997, the FDA mandated a moderate level of folic acid fortification of grain products. Still, most people don't get enough folic acid.
Most multivitamins contain both nutrients, as do whole grains, oranges, and green vegetables.
The UM study was funded in part by the Agency for Healthcare Research and Quality. This information is provided for educational purposes only. Please read the disclaimer .