Essential mineral for strong muscles and bones Supports heart, brain and nervous system health Full Spectrum formula features plant-based ingredients without unnecessary processing For nearly 5 years, Swanson has delivered science-backed health products worldwide. Each wellness supplement is made in our GMP certified facilities, and our purity and potency testing includes independent third-party labs We're control freaks... in a good way! For nearly 5 years, Swanson Health has delivered science-backed health products worldwide. In 1969, we began in Fargo, ND, with a mission to offer wellness solons that help people live simply healthier together. Our facilities are Good Manufacturing Practice (GMP) certified, and our purity and potency testing includes independent third-party labs. Clinical research, scientific consensus and usage traditions guide our innovation Magnesium is an important mineral that is necessary to good health. Swanson Magnesium delivers 200 mg per capsule of magnesium to help you meet your daily needs.