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A polyphenol-rich diet is associated with decreased
platelet aggregation in breast cancer patients

It is well documented that plant polyphenols have both anti-cancer and anti-platelet effects. Hence, the aim of this work was to investigate
a relationship between dietary intake of polyphenols and platelet aggregation in newly-diagnosed breast cancer patients. The
nutritional value of a diet, including dietary intake of plant polyphenols was estimated. Platelet aggregation was induced with arachidonic
acid (0.5 mmol/l), collagen (3.2 μg/ml) or ADP (6.4 μmol/l) and measured using multiple electrode aggregometry (Multiplate®) in
whole blood. It was found that platelet aggregation was significantly higher in the low polyphenol intake group than the high intake
group: the respective values (area under the aggregation curve recorded in units; U) were arachidonic acid: 84.8 vs. 65.3, P=0.003; ADP:
76.5 vs. 67.8, P=0.006; collagen 79.5 vs. 64.3, p=0.024 respectively. The study indicates, for the first time, an association between diet
rich in polyphenols and reduced platelet reactivity in breast cancer patients.

