Thank you 123555 for your post. I just discovered that I have the same problem although I didn't brush with Miracle-Mineral-Supplement but simply drinking. I developed brown spots and erosion particularly next to gum-line especially on lower jaw as I used to consume Miracle-Mineral-Supplement solution before putting night guard at night. The space between teeth has increased so am drinking through a straw. The strangest thing is that oil pulling with Coconut oil caused a large flake on top incisor to break off spontaneously after brushing with arm and hammer whitening toothpaste. I decreased the Miracle-Mineral-Supplement dosage from 15 to 8 drops/day (and drinking with a straw) and am taking calcium/magnesium supplements for teeth as I am concerned about this ongoing. Not sure if the whitening toothpaste or Coconut oil had anything to do with tooth breaking off spontaneously or whether MMS in bloodstream robs minerals there but so far so good.