For many years Gingko has been touted as a brain booster. In a trial published by the American Medical Association in November 2008, the results suggest that Gingko may not be helpful as once thought to help prevent dementia in an age group of 75+. This was part of the largest gingko / dementia trial ever. Consumer Reports, in their March 2009, recommends saving your money and not purchasing Gingko biloba supplements, which can cost about $200 a year.