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		Arrowwind09:  Wanted to pass this information along.  Ordered "horsetail" from a company titled iHerb--it came from Nature's Way.  I got to thinking how much silica is in this product; called the company and was told only TRACE AMOUNT.  Did some digging and found that silica should be plant-based, standardized to contain 10-15% silica, and the standardized dose should be 300 milligrams three times daily.  Am now looking to find the standardized amount required.