Magnesium is the mineral modern life strips away — from the soil that grows the food, from the food that reaches the table, from the water that used to carry it, from the body that once held it in reserve. Chronic depletion has become the background condition of industrialized populations, and it shows up as cardiovascular disease, metabolic disease, neurological symptoms, hormonal disruption, and the accelerating fatigue of everyday life. This book gathers the terrain-medicine understanding of why the mineral has become so hard to find and so easy to lose, and it lays out the practical restoration work in enough detail that a determined reader can begin without a practitioner. It draws on the clinical framework of Curious Outlier's Magnesium Mastery course, the foundational documentation of Mildred Seelig, the clinical reference of Carolyn Dean, the transdermal work of Mark Sircus, the electromagnetic mechanisms documented by Arthur Firstenberg and Martin Pall, and the terrain framework that runs from Antoine Béchamp through Herbert Shelton to Thomas Cowan. Seventeen chapters cover the four evidence lines, the four insults of modern life, the cardiac and neurological pattern, the metabolic and hormonal picture, the reproductive terrain, and the forms of magnesium and how to use each. Eight appendices give condition quick-reference, drug depletion tables, dosing by form, food sources, transdermal protocols, troubleshooting, and further reading. A full index sends you to what you need. The mineral is inexpensive. This is how you get it back.