Polyol sweeteners and platelet activation: implications for cardiovascular risk

Erythritol and xylitol, long considered safe and metabolically inert sugar substitutes, are now drawing scientific attention for reasons beyond glycemic control. Recent findings suggest that these polyols may influence platelet function and thrombosis risk. In vitro and in vivo studies have shown that both compounds can enhance platelet responsiveness to classic agonists such as ADP and thrombin. These effects affect changes in intracellular calcium dynamics, integrin activation and granule secretion. What is most important, these responses occur at physiologically relevant concentrations. However, interpretation is complicated by the fact that erythritol and xylitol are not only diet-derived; both can be synthesized endogenously via the pentose phosphate pathway. As a result, elevated plasma levels may reflect an adaptive response or pathological state rather than direct intake alone. Mechanistically, the pathways involved remain poorly defined but early data suggest potential overlap with signaling cascades modulated by statins – including those dependent on isoprenoid intermediates. These findings open a new field for investigation into whether polyols act as modifiers of platelet activation or as biomarkers of metabolic imbalance. To turn things more complicated, the gut microbiota, chronic polyol exposure and individual cardiovascular risk profiles add further complexity to this relationship. A clearer understanding will require integrated studies that bridge biochemistry, clinical data and nutrition science. In this review, I critically assess the emerging evidence on erythritol and xylitol in the context of platelet biology and thrombotic risk. I also explore how these polyols might intersect with known metabolic and signaling pathways, to clarify whether their effects are harmful, adaptive, or context-dependent.