Advancements in breast cancer treatments have enabled more women to live longer. However, these treatments can increase the risk of osteoporosis, a condition that makes bones thinner and more prone to fractures. Both breast cancer and its treatments can weaken bones. Understanding your risk of osteoporosis can help you protect your bones during treatment and as you age. Here are some ways to keep your bones strong: 1. Get enough calcium and vitamin D. These nutrients strengthen bones. You need 1,000 to 1,200 milligrams of calcium and 800 to 1,000 international units (IU) of vitamin D daily. 2. Engage in weight-bearing exercises such as walking, stair climbing, and playing tennis to strengthen your bones. 3. Avoid tobacco and alcohol, as these substances can weaken bones. 4. Consult your doctor about other ways to protect your bones, including medication options.