Magnesium plays a supporting role in bone health by assisting with calcium absorption and influencing vitamin D metabolism. Around 50–60% of the body’s magnesium is stored in the bones. However, magnesium is not the primary mineral responsible for building and maintaining bone structure — that title belongs to calcium. Magnesium’s contributions are indirect, enhancing the function of calcium and contributing to bone strength when present in balanced levels. Deficiency in magnesium can negatively impact bone density over time, but without adequate calcium, the structural component of bones cannot be effectively maintained. Magnesium and calcium work together, but if you had to choose the most essential mineral for bone health, calcium is the one to remember.