A new review reveals how folic acid can act as both a friend and foe in breast cancer, protecting at moderate doses, but potentially fueling tumor growth when intake is excessive or genes go awry.

Do not lie down for at least 10 minutes after taking the tablets or ... If your brand of multivitamin also contains folic acid, be sure to tell your doctor or pharmacist if you take certain ...

A new review reveals how folic acid can act as both a friend and foe in breast cancer, protecting at moderate doses, but potentially fueling tumor growth when intake is excessive or genes go awry.