When the color does not change, it does not mean it is not effective.
We are doing more research and found the color change would be too subtle to tell.
A better way would be to use a PH tester to test before and after foot bath.
When the color does not change, it does not mean it is not effective.
We are doing more research and found the color change would be too subtle to tell.
A better way would be to use a PH tester to test before and after foot bath.
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