Dr. Browwstein specifies "Body pH" as measured by urine/saliva test strips.
We have the "Blood pH" which is maintained by our metabolism to keep us alive. Our metabolism will steal nutrients from flesh & bone to keep blood pH constant. Other areas of the body keep a very low pH such as the stomach.
People with pH in the 4.x & 5.x areas are VERY sickly, and are a breeding ground for disease. It is easy to adjust body pH by changing our diet. http://www.iconperformanceonline.com/?p=3678