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Updated: Jun 17, 2026
Preparation of Washed Human Platelets for Quantitative Metabolic Flux Studies
Published on: January 10, 2025
Impact of dietary polyphenols on human platelet function--a critical review of controlled dietary intervention
Luisa M Ostertag1, Niamh O'Kennedy, Paul A Kroon
1Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, UK.
Insights
Dietary polyphenols may protect against cardiovascular disease by inhibiting blood platelet activation. While cocoa products show consistent benefits, more research is needed on other polyphenols and standardized methods.
Area of Science:
- Nutrition Science
- Cardiovascular Health
- Biochemistry
Background:
- Cardiovascular disease (CVD) is a major health concern, influenced by factors including blood platelet activation.
- Platelets contribute to atherosclerotic plaque formation and inflammatory processes.
- Plant-based diets, rich in polyphenols, show protective effects against CVD.
Purpose of the Study:
- To review human intervention studies on the effects of polyphenol-rich diets on platelet function.
- To assess the evidence for dietary polyphenols in mitigating platelet-related cardiovascular risk.
- To identify gaps in current research and suggest future directions.
Main Methods:
- Systematic review of 25 human intervention studies.
- Analysis of studies examining polyphenol-rich diets and platelet function markers.
- Evaluation of diverse research methodologies and study designs.
Main Results:
- Dietary polyphenols exhibit inhibitory effects on platelet function, both in vitro and in vivo.
- Cocoa-derived products consistently demonstrate platelet-inhibiting effects at moderate intake levels.
- Significant heterogeneity in study methods and outcomes leads to controversial assertions regarding other polyphenols.
Conclusions:
- Cocoa polyphenols show promise in modulating platelet function for cardiovascular protection.
- The bioavailability and efficacy of other dietary polyphenols require further investigation.
- Standardized methodologies are crucial for future research on dietary polyphenols and platelet activity.
Abstract:
Cardiovascular disease is a chronic disease influenced by many factors, with activated blood platelets being one of them. Platelets play a central role in the formation of plaques within blood vessels, contributing to early inflammatory events. Consumption of diets rich in plant-based products protects against the development of cardiovascular disease. Polyphenols, which are secondary plant metabolites found in a wide range of foodstuffs and beverages, may be partially responsible for these effects. Their protective properties include inhibitory effects on platelet function in vitro and in vivo. However, the bioavailability of many polyphenols is poor and it is unclear whether sufficient quantities can be obtained by dietary means to exert protective effects. Consequently, this review summarizes 25 well-controlled human intervention studies examining the effect of polyphenol-rich diets on platelet function. These studies report a huge variety of research methods, study designs, and study subjects, resulting in controversial assertions. One consistent finding is that cocoa-related products, however, have platelet-inhibiting effects when consumed in moderate amounts. To assess whether other classes of dietary polyphenols, or their metabolites, also beneficially affect platelet function requires more well-controlled intervention studies as well as the adoption of more uniform methods to assess platelet aggregation and activation.
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