Can't sleep due to restless legs or racing thoughts? This evidence-based guide compares the best magnesium glycinate supplements of 2025—including Thorne Research, Doctor's Best, and KAL. Learn why chelated magnesium works better than oxide, optimal dosing for sleep support (200-400mg), and which third-party tested brands healthcare professionals trust. Includes star ratings, absorption comparisons, and expert recommendations to help you choose the right supplement for deep,