Jigsaw Magnesium Supplement with SRT® (sustained release technology) is one of the best magnesium supplements on the market in my opinion.  Jigsaw Magnesium Supplements deliver one of the highest doses of magnesium available at 500 mg.  This is made possible by the SRT® that releases magnesium into your system gradually over time rather than dumping the full dose into your bloodstream at once.  It is well documented that without SRT® a dose of magnesium this high would create a very unpleasant laxative effect.


  • High Dose
  • Gradual Release
  • Gluten, GMO, Soy & Lactose Free
  • Vegan Friendly


  • Expensive