Preventing osteoporosis can be achieved by increasing bone density. First, consume foods rich in calcium and vitamin D, such as dairy products, green vegetables, and fish. Secondly, maintain regular exercise, especially weight-bearing exercises like brisk walking, running, and weightlifting, which can strengthen bones. Thirdly, avoid excessive alcohol consumption and smoking, as these habits weaken bones. Fourthly, ensure adequate protein intake but avoid overconsumption. Regular check-ups to monitor bone density and adjust lifestyle accordingly. Additionally, sunlight exposure helps the body synthesize vitamin D, so moderate sun exposure daily is beneficial.