Magnesium complex benefits include better sleep, reduced stress/anxiety, improved mood, increased energy, and stronger bones, supporting over 300 bodily functions like muscle relaxation, nerve function, blood sugar control, blood pressure regulation, and heart health, with specific forms like L-threonate boosting brain function and citrate easing constipation. It's crucial for overall wellness, aiding exercise recovery, migraines, and PMS, and helping those with deficiencies.