There are many types of magnesium, all with distinct health benefits . Magnesium oxide has a lower absorption rate into the bloodstream compared to other forms, which delivers more magnesium to the GI tract, making it uniquely suited to supporting digestive regularity. Swanson Magnesium Oxide features a potent 500 mg per serving of this essential mineral. Magnesium is needed by the body for hundreds of enzymatic reactions. Healthy magnesium levels promote cardiovascular health and function, support blood pressure levels within the normal range, and help maintain a healthy mood, cognitive function and musculoskeletal health. Magnesium oxide has a long history of use for supporting bowel regularity and digestive function as well as offering relief from occasional constipation. Magnesium oxide works to support healthy bowel function because it draws water into the intestines to soften the stool and promote elimination. Magnesium is also popular for supporting muscle comfort. Emerging science suggests magnesium oxide may help ease tension specifically in the neck and head.