Key result
Dried blood spots show high concordance with capillary plasma in tracking postprandial lipid changes.
Why the study?
Traditional venipuncture poses practical limitations for repeated postprandial blood sampling, motivating evaluation of dry blood spots as a minimally invasive alternative for monitoring postprandial lipemia.
Can dry blood spots (DBS) reliably capture postprandial lipidomic changes compared to traditional capillary plasma sampling in healthy young women?
Can dry blood spots (DBS) reliably capture postprandial lipidomic changes compared to traditional capillary plasma sampling in healthy young women?
Absolute Event Rate: 34% vs 64%
Dry blood spots serve as a valid, minimally invasive alternative to plasma for capturing dynamic postprandial metabolic shifts in circulating lipids, particularly triglycerides and free fatty acids.
DBS may enable simpler postprandial lipid monitoring in research; leaves open clinical adoption pending validation in larger, diverse cohorts.
Purpose The postprandial period provides a dynamic window to assess metabolic function, as nutrient intake elicits measurable shifts in metabolism, that can be used to assess health status. Traditional venipuncture, though standard for blood sampling, poses practical limitations for postprandial studies that require repeated collections. This study evaluated the feasibility of using dry blood spots (DBS) as a minimally invasive alternative for monitoring postprandial lipemia, which can vary significantly after the intake of high-fat meals. Methods Ten young women (26.1 ± 4.5 years) participated in a controlled clinical trial designed to evaluate lipidomic responses to a standardized, energy-dense meal using both DBS and capillary plasma samples. An analytical method based on ultra-high-performance liquid chromatography coupled with high-resolution mass spectrometry (UHPLC-ESI-TOFMS) was employed for the quantitative profiling of lipid species. Results The postprandial lipidome derived from DBS and plasma samples exhibited high concordance, with triglycerides (TG) and free fatty acids (FFA) standing out among 18 identified lipid classes as the most responsive to food intake in both matrices. Postprandial TG concentrations increased by 64% in plasma and 34% in DBS, while FFAs decreased by 36% and 14%, respectively. In addition, DBS-specific postprandial lipidomic signatures were observed, including alterations in the levels of glycerophospholipids and sphingolipids, along with a peculiar kinetic pattern of phosphatidylethanolamines levels following food intake. Conclusion These findings highlight the suitability of DBS for capturing postprandial lipidomic changes in circulation, particularly in TG and FFA levels, and support its utility as a practical and scalable tool for metabolic phenotyping in nutritional research, population studies, and clinical monitoring.
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Duarte et al. (2026) studied Healthy (n=10). Dry blood spot (DBS) sampling vs. Capillary plasma sampling was evaluated on Postprandial increase in triglycerides following a dietary challenge. Dry blood spots and capillary plasma exhibited high concordance in capturing postprandial lipidomic changes, with triglycerides increasing by 34% in DBS and 64% in plasma following an energy-dense meal.
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