Pomegranates are rich in antioxidants and flavonoids, both of which are known to prevent free radicals from damaging your cells. In some studies, pomegranates show potential to be effective in preventing prostate, breast, lung, and colon cancers. Various parts of the tree and fruit are used to make medicine. People use pomegranate for high blood pressure, athletic performance, heart disease, diabetes, and many other conditions, but there is no good scientific evidence to support most of these uses. Pomegranate has been used for thousands of years.