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Old 04-25-2012, 06:42 PM   #5 (permalink)
IBswilson
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Join Date: May 2011
Posts: 134
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1500mg is the RDA/AI for most adults under 50 (2300mg is the upper limit).

Dietary Reference Intake - Wikipedia

http://www.iom.edu/Global/News%20Ann...ry_Listing.pdf
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