Let me clarify: I do believe that when the clay in a clay bath changes color, in cases where the clay would not change color due to a water source, that it does represent metals being eliminated from the body.
The primary point I'd like to make is that **just because** the clay in a bath DOESN'T change color, it doesn't mean that metals have not been eliminated.
In the case example on our website, where the Melisa test confirmed both mercury toxicity and the elimination of Mercury, there was no change in the color of the clay in the bath!