60K+ bought in past month. Amazon has the 240-Count NatureBell 500mg Magnesium Glycinate with Fat Soluble Vitamin C for $16 - 20% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $11 with free shipping on $35+ or with Prime. Supplement for Sleep, Heart & Muscle Support.