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Re: [RC] Calcium Carbonate - Sisu West Ranch"...pharaceutical grade is the most pure. ..."Just a comment on "grades" of chemicals. Pharmaceutical grades are in general quite pure, especially in relation to things that may hurt you. There are purer grades of chemicals (CP, ACS certified) that may or may not be just as suitable for ingestion. When choosing stuff to ingest , you are probably safer using things marketed as "food" or "pharmeceutical". One time I was getting a product ready to go on the market and got a call from an internal regulatory person that he could not find a chemical I used in his data base, so he couldn't approve the formulation. I sent him the information that I was not only using :"food grade" it was also Kosher certified. It turned out that his source only listed things that had a maximum tolerance in chemical products. Ed
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