I think the answer about flora is absurd! First of all, we've been told it does NOT kill the flora. Secondly, I believe I've read gray stools is to do w/ the liver.... but... I will CHECK on google real quick...
Which... is what I reccomend every one do, ALWAYS. Don't rely on others' answers, and wait for weeks or months for an answer. What good does that do? Google it!! Google any ? you have! Even ?'s about the Bible come up! Any one can do it!! Gain knowledge! ;-)
"Stools that look like clay or putty may be caused by a problem in the biliary system. The biliary system is the drainage system of the gallbladder, liver, and pancreas. This condition is also known as acholic stools.
The inability of the digestive system to absorb fat properly may result in stools that are light in color (yellow to gray) and appear greasy.
Bile is created in the liver and stored in the gallbladder and released into the first section of the small intestine (the duodenum) while food is passing through. Bile gives stool its brown color, so if bile is not being produced or if the bile ducts are blocked, the result could be stool that is pale.
Common causes of stool that is pale or clay colored include:
Hepatitis A,B, or C
Side effects from medication
"4. Gray stools, pale stools, putty or clay colored stools may be seen in hepatitis, gallbladder disorders, or malabsorption conditions. Bile salts in the stool excreted by the liver give it a normal brown color. Obstruction to bile flow out of the liver (you may see the word "cholestasis"), or liver infections like viral hepatitis (A, B, C, etc.), may produce clay colored stools. Possible causes for clay colored stool result from problems in the biliary system (the drainage system of the gallbladder, liver, and pancreas): Malabsorption problems can cause undigested fat in the stool (steatorrhea) which is characterized by foul smelling, light yellow to gray, greasy or frothy stools. This may also be caused by low bile output."