In-depth analysis and outlook on the effect of selenium on cancer

This study focuses on the relationship between selenium and cancer, and analyzes the mechanism of selenium in the occurrence, development, prevention and treatment of cancer, including its antioxidant, immunomodulatory and other functions on cancer, through the existing literature research and rational thinking. It is found that selenium deficiency increases the risk of cancer, and moderate selenium supplementation has positive significance in cancer prevention and treatment, but the effects of long-term supplementation with different doses of selenium have yet to be clarified. The study aims to provide a theoretical basis for cancer prevention and treatment, help optimize clinical intervention strategies, and promote the development of selenium in cancer research.