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Discharging or initiating a patient on Renamag

Renamag dosing conversion

There are many factors that can affect the absorption and tolerability of various magnesium salts.  This said, below is a general conversion from magnesium oxide to Renamag/magnesium glycerophosphate.


Mg glycerophosphate bioavailability 60%

Mg oxide Bioavailability 15%


  • Renamag dose of two 425mg capsules = 100mg elemental Mg x 60% = 60mg Mg
  • Mg oxide 400 mg =244mg elemental Mg x 15% = 37mg Mg

Printable Renamag initiation and discharge instructions

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