The concentration they used was 1000ppm or about 0.1%. Many things are toxic at that concentration. (This doesn’t cross the threshold of absurdity of “sodium c

The concentration they used was 1000ppm or about 0.1%. Many things are toxic at that concentration. (This doesn’t cross the threshold of absurdity of “sodium chloride is toxic at that concentration,” but it would be preferable not to drink 0.1% salt water.)