No Two Fluoride Additives are the Same - The study shows.  "A new perspective on metals and other contaminants in fluoridation chemicals*" Phyllis J. Mullenix  NURO TOXICOLOGIST Former Forsyth Institute      https://s3.amazonaws.com/SecureTheRepublic/State%20Documents/Arkansas/89808881_Mullenix-2014.pdf

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No Two Fluoride Additives are the Same - The study shows. 
"A new perspective on metals and other contaminants in fluoridation chemicals*"
Phyllis J. Mullenix  NURO TOXICOLOGIST Former Forsyth Institute     
https://s3.amazonaws.com/SecureTheRepublic/State%20Documents/Arkansas/89808881_Mullenix-2014.pdf