Polyphenols are antioxidants that neutralise destructive free radicals that are produced naturally during metabolism. Free radical damage is implicated in premature death, DNA destruction, cell membrane breakdown, cancer, heart disease, depressed immunity and inflammation. In the laboratory, polyphenols from red wine and green tea stopped the growth of cultured prostate cancer cells by interfering with a biochemical pathway involved in their replication. In living animals, red wine and green tea polyphenols slowed prostate cancer growth in mice that were genetically altered to produce human prostate cancer cells. Antioxidants found in foods such as red wine and green tea may have widespread health benefits that prevent degenerative diseases such as cancer and heart disease.