Do you often feel tired, tense, or have trouble sleeping for no apparent reason? The answer might lie in a mineral that's as essential as it is overlooked. In this clear, science-based guide, John Altman reveals how magnesium quietly regulates hundreds of vital processes: sleep, mood, muscles, the heart, metabolism, and bones. You'll discover why magnesium deficiency is so widespread and difficult to detect, which foods to prioritize, how to navigate the various supplements available, and when to use them safely. Honest about the evidence and never sensationalist, this book guides you through a practical four-week plan toward more robust daily well-being.