Why chocolates, olive oil and tea are healthy for you

Researchers are focussing on the healthful antioxidant substances in red wine, dark chocolate, olive oil, coffee, tea, and other foods and dietary supplements.

The American Chemical Society, the world's largest scientific society, is holding a symposium on those substances during its 246th National Meeting and Exposition.

Reports in the symposium involve substances that consumers know best as 'antioxidants,' and that scientists term 'phenolic derivatives.'

These ingredients, found naturally in certain foods and sold as dietary supplements, have been linked with health benefits that include reducing the risk of heart disease and cancer.