Green leafy vegetables and folic acid (vitamin B9) pills almost cut risk for invasive breast cancer in half

Millions of American women have undetected breast cancer that will not affect their lives nor their life expectancy. A small percentage of breast tumors will be detected and treated and an even smaller number will become invasive, spread, and threaten life. Of those cases of breast cancer that do become invasive, researchers in Sweden report that folic acid, a common B vitamin found in dark-green leafy vegetables and provided in supplements, slashes the risk for invasive breast cancer by 46% (comparison between high and low folic acid intake from diet and/or supplements). –American Journal Clinical Nutrition 86: 434-43, August 2007.