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  • Title: Acute reduction in blood pressure following consumption of anthocyanin-rich cherry juice may be dose-interval dependant: a pilot cross-over study.
    Author: Kent K, Charlton KE, Jenner A, Roodenrys S.
    Journal: Int J Food Sci Nutr; 2016; 67(1):47-52. PubMed ID: 26654244.
    Abstract:
    A pilot cross-over study assessed the acute effects on blood pressure and plasma biomarkers associated with consumption of a 300 ml anthocyanin-rich fruit juice, provided in differing dose-intervals. Young adults (n = 6) and older adults (n = 7) received in random order, either a single 300 ml dose or 3 × 100 ml doses of high-flavonoid cherry juice provided at 0, 1 and 2 h. Blood pressure and plasma levels of phenolic metabolites were measured at 0, 2 and 6 h.The single 300 ml dose of cherry juice resulted in a significant reduction in systolic (p = 0.002), and diastolic blood pressure (p = 0.008) and heart-rate (p = 0.033) 2 h after consumption, before returning to baseline levels at 6 h post-consumption. The 3 × 100 ml dose provided over 2 h did not result in significant blood pressure reductions. Plasma phenolic metabolites increased at 2 and 6 h; however, fluctuations were higher after the single 300 ml dose in older adults. These findings have implications for design of intervention studies that investigate vascular effects associated with flavonoid-rich foods.
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