Certain medicinal mushrooms (such as shiitake) contain a compound that may help strengthen your immune system. Known as active hexose correlated compound (AHCC), this compound is often said to boost your defense against cancer.
So far, very few scientific studies have tested the cancer-fighting effects of AHCC. However, some preliminary research shows that AHCC may indeed rev up activity in a number of immune cells. What's more, tests on animals indicate that AHCC may inhibit the growth of cancerous tumors.
Although there's no known way to prevent cancer, you can lower your cancer risk by avoiding cigarette-smoking and tobacco use. There's also evidence that following a healthy diet rich in antioxidants, working out regularly, and keeping your weight in check can help fend off cancer. What's more, some studies suggest that sipping green tea and maintaining optimal vitamin D levels may aid in cancer prevention.