I take Magnesium Glycinate 200 mg gummy. Magnesium Glycinate is different from Magnesium Citrate or Magnesium Oxide which can cause stomach upset. I have had back pain from lumbar discs for over a year and have found the Magnesium helps with pain from muscle cramping, and insomnia. I also feel more rested and stronger since taking the supplement. Magnesium helps with bone density by helping to keep bones strong. I do separate the Magnesium dose from my daily Calcium and Vit D by 8 hours.