Vitamin D’s Impact on Cancer Incidence and Mortality: A Systematic Review
Sunil J. Wimalawansa – While many observational studies support vitamin D’s protective role in incidents and deaths from cancer, some recent mega-RCTs have failed to demonstrate this, primarily due to critical study design flaws. Well-designed, adequately powered clinical trials using appropriate methodologies, sufficient vitamin D3 doses, and extended durations consistently demonstrate that proper supplementation significantly reduces cancer risk and markedly lowers cancer mortality.














