date:Dec 27, 2012
6 women and 16 men. They compared platelet function of the participants who ate enriched dark chocolate with those who ate dark chocolate that contained a lower cocoa and flavanol content, and white chocolate.
Blood and urine samples were obtained and analyzed two hours and six hours after chocolate consumption. They found the dark chocolate enriched with flavan-3-ols significantly decreased platelet activation and aggregation in men, but only decreased platelet aggregation in women.