Peroxide solutions can cause sensitivity in teeth. The teeth whitening 
companies are trying to find ways to improve this.ONe of the things that they 
are doing, is to add a calcium solution to  the carbomer peroxide solution and 
lower the amount of peroxide previously used. Using it straight to rinse with 
can cause alot of sensitivity. It is interesting that cs helped with this.
  Thanks to the people that answered my question on cs ,salt c and lyme disease

                
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