Can your stools turn clay colored from daily use of miralax (polyethylene glycol) and probiotics?

They shouldn't: Stools get much of their natural color from bile that comes from the gall bladder to help digest fats. Clay colored stools mean there is a lack of bile in the stools. Since neither Miralax (polyethylene glycol) nor typical probiotics cause stools to lack bile, it is most likely a coincidence that one's stool turns clay-colored while using Miralax (polyethylene glycol) and probiotics. One still has to see her doctor to fine the cause.