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 [RC] More on magnesium - Naomi PrestonAngie, you right about one form of magnesium;  mag. sulfate 
(MGSO4, epsom salts), is a laxative.  I just happened to see it on 
the AERC Prohibited Substances list.  Maybe a vet can explain 
why.  Other forms of magnesium are magnesium oxide (MgO), 
magnesium carbonate (MgCO3), and magnesium L-aspartate. 
Naomi Preston 
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