Fisetin to Improve Physical Function in Stage I-III Breast Cancer Survivors

This study is testing whether fisetin — a natural compound found in fruits and vegetables that removes damaged aging cells (called senolytics) — can improve physical function and reduce fatigue in postmenopausal women who have completed treatment for early-stage breast cancer. **You may be eligible if...** - You are a postmenopausal woman (either over 60, or under 60 with confirmed menopause through lab tests or surgical removal of ovaries) - You were diagnosed with stage I–III breast cancer and have completed active treatment **You may NOT be eligible if...** - You received chemotherapy, biological therapy, or immunotherapy in the last 30 days (some exceptions apply for maintenance therapies like tamoxifen or aromatase inhibitors) - You had surgery or radiation in the last 30 days - You have other conditions making participation unsafe Talk to your doctor to see if this trial is right for you.