A group of researchers in Israel discovered that a meal of grilled turkey burger resulted in a lot of oxidizing chemicals in rats' stomachs. But they could counteract that problem by feeding the rats some red wine concentrate with the meals. This concentrate was very high in catechins, the same anti-oxidants found in cocoa. They found that the antioxidants in food started doing their good work right in the stomach, and concluded that there is an "important benefit of consuming dietary polyphenols during the meal."
- J Agric Food Chem. 2008 Jun 10. PMID: 18540628. The Stomach as a "Bioreactor": When Red Meat Meets Red Wine. Gorelik S, Ligumsky M, Kohen R, Kanner J.