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Old 09-01-2010, 12:44 PM
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mrsD mrsD is offline
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mrsD mrsD is offline
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Join Date: Aug 2006
Location: Great Lakes
Posts: 33,508
15 yr Member
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Quote:
Originally Posted by Chemar View Post
just a personal word of warning re calcium carbonate

we have discovered much of it comes from oyster shells and they appear to be very high in lead!

now use calcium citrate instead
Yes, the OsCal brand uses oyster shell sources. I never would let my customers choose it. Some calcium carbonate is manufactured in chemical plants, and supposedly that contamination (which also includes cadmium in addition to lead now BTW) is supposed to be not a worry. The best way to tell is to read the labels carefully. Oyster shell must be listed in the ingredients if present.

The citrate form is slightly better absorbed, and also good for patients with a history or worry about kidney stones. Citrate helps prevent the calcium oxalate type which about 80% are.

But yes, thanks for the reminder, Chemar!
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