Baking soda question?

I was informed by my doctor that when the body exposed to such metals (especially Mercury--think tooth fillings) over a period of time one is exposed to a myriad of potential diseases, most prevalent is Alzheimer's since the metals accumulate in the brain the most..ok, so to the point, I also read somewhere one... show more I was informed by my doctor that when the body exposed to such metals (especially Mercury--think tooth fillings) over a period of time one is exposed to a myriad of potential diseases, most prevalent is Alzheimer's since the metals accumulate in the brain the most..ok, so to the point, I also read somewhere one of the main ingredients in baking soda was sodium aluminum sulfate and some other metal, I use baking soda daily along with natural toothpaste to whiten my teeth (works marvelously might I add) I hear also conflicting things saying baking powder is the one with the aluminum ingredients which is true?

All answers appreciated
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