I suggested that you visit Hawkeye-Jensen,Inc. on google and look at the in 
vitro test data. They made 20 PPM EIS and diluted it to 10 PPM,  3 PPM, and 1 
PPM. They did not publish the  1PPM data as they sell 3PPM material. There is 
reason to believe that the 1 PPM was superior to the 3 ppm.
   
  Please do not come back and say that in vitro  testing is not valid. It will 
merely expose your ignorance.
   
  "Ole Bob"