We understand you might be skeptical. How could reversing a magnesium deficiency — with 7 proven forms of this one nutrient — do so much? You’ve seen the research. Magnesium Breakthrough works. And by the time you read this, it will have already changed the lives of thousands of people. Plus, our company — BiOptimizers — has been in business for 15 full years. We stand behind our products and guarantee that they will do what we say they do. If you purchase 1 bottle and you are not completely satisfied, within 365 days you may request a full refund (minus shipping & handling cost).