Just as the bone breaks down it can also rebuild itself. A limited increase in bone density through nutritional measures is possible, but this is a lengthy process that can take several years. Even stopping bone loss and preserving bone mass is a success. For a long time, it was assumed that calcium alone was responsible for bone strength. We now know more about the interaction of various components of nutrition (calcium, magnesium, phosphorus, boron, silicon, vitamin D, vitamin K) and lifestyle (sufficient movement and exercise, not smoking, moderate alcohol consumption). To maintain and rebuild bone density, it makes sense to take special supplements that supply all of the necessary micro-nutrients in the right quantities. Common calcium + vitamin D preparations lack essential active ingredients. Long-term use is important.