Cancer Advisor

Evidence Summary Overall Evidence Grade: A (Strong Clinical Evidence) Multiple randomized controlled trials, meta-analyses, and international oncology guidelines show that exercise, nutrition optimization, vitamin D sufficiency, sleep support, and stress reduction improve cancer-related outcomes when used alongside standard cancer treatments . These interventions are associated with: Improved treatment tolerance Reduced cancer-related fatigue Better quality of life Improved survival in several cancer types These approaches are adjunctive, not curative, and must not replace evidence-based oncology care. What Does the Evidence Say About Lifestyle and Cancer Outcomes? Cancer outcomes are influenced not only by tumor genetics, but also by the biological environment of the patient . Across cancer types, worse outcomes are consistently linked to: Insulin resistance and metabolic dysfunction Chronic systemic inflammation Immune suppression Neuroendocrine dysregulation (stress hormones) Muscl...