Silver Book Fact
It is estimated that 37.4% of the US population 20 years of age has prehypertension–including 41.9 million men and 27.8 million women.
Rosamond W, Flegal K, Furie K, Go A, et al. Heart Disease and Stroke Statistics- 2008 Update. Circulation. 2008; 117. http://circ.ahajournals.org/cgi/content/short/117/4/e25