For several decades now, Americans have come to believe that the following two practices are foundational in a healthy lifestyle: (1) eat a low-fat diet, and (2) stay away from the sun. I believe that, to solve the obesity epidemic, we need to abandon these two practices. Additionally, if people consume adequate amounts of calcium, then all three nutritional deficiencies that have led to obesity will be overcome: vitamin D, calcium, and dietary fat.
The result of these three deficiencies is defective glucose uptake in both muscle and fat cells. The obese person becomes trapped in an endless metabolic cycle of trying to supply the energy needed for a steadily increasing demand. The fat cells are at the center of the storm, because they are burdened with the arduous assignment of converting the excess consumed sugars and carbohydrates into fat. The fat cells must do this because the muscle cells are impaired with a malfunctioning ability to metabolise sugars. Even if the metabolic problem were not fixed, if the obese person simply ate more fat, and therefore consumed fewer carbs, the fat cells' burden would be greatly alleviated. In addition, getting plenty of vitamin D and calcium, either through diet or sun exposure, would alleviate the core problem of impaired glucose transport across the cell wall. Now that the heart and muscles can utilize sugars directly, the excessive burden on the fat cells to expand and proliferate is relieved, and the body fat will inevitably melt away.