Taking calcium tablets can help prevent osteoporosis, but they are not enough on their own. Preventing osteoporosis requires a comprehensive approach, including: 1. A balanced diet rich in calcium and vitamin D, such as milk, fish, and leafy greens; 2. Regular exercise, especially weight-bearing activities like walking and running, to strengthen bones; 3. Quitting smoking and limiting alcohol to reduce negative effects on bones; 4. Regular check-ups to monitor bone density and take early action if needed.