The National Cancer Institute lists several trials and studies that demonstrate the potential of tea in cancer prevention. Black tea contains high concentrations of antioxidants known as polyphenols. These compounds have been linked to a lower risk of certain types of cancer. The most powerful of these antioxidants is known as EGCG or epigallocatechin gallate (1). If combined with a healthy lifestyle, it may help prevent cancerous cells from forming or reproducing. More research is needed, but so far black tea has shown potential health benefits when it comes to cancer prevention.