Insights & Discussion
Montmorency tart cherry juice intake can significantly lower systolic blood pressure in men with early hypertension, with improvements linked to phenolic acids.
In a carefully controlled, blinded, crossover study employing a randomized Latin square design, fifteen male participants showing early signs of hypertension were given either a 60-mL dose of Montmorency tart cherry (MC) concentrate or a placebo. A recovery period of at least 14 days was allowed between tests to eliminate lingering effects from the previous test. Observations centred on microvascular reactivity, arterial stiffness, blood pressure, and phenolic acid absorption, and these were collected at designated intervals before and up to eight hours after consuming the MC concentrate or placebo.
The analysis of the data revealed that consumption of the MC concentrate resulted in a significant reduction in systolic blood pressure in comparison to the placebo, reaching maximum impact two hours after intake. Crucially, this positive effect was found to coincide with an increase in circulating protocatechuic and vanillic acid 1-2 hours post consumption. Thus, it is suggested that the benefits of MC for cardiovascular health, particularly for blood pressure control, can be directly attributed to the influence of these circulating phenolic acids.
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Daily consumption of tart cherry juice may reduce processes involved in accelerated atherogenesis, potentially decreasing the risk of cardiovascular diseases.
2020 Journal of Medicinal Food Effects of Montmorency Tart Cherry Juice Consumption on Cardiometabolic Biomarkers in Adults with Metabolic Syndrome: A Randomized Controlled Pilot Trial Johnson SA, Navaei N, Pourafshar S, Jaime SJ, Akhavan NS, Alvarez-Alvarado S, et al.
Randomised Controlled Trial Cardioprotective Effects Cardiovascular Disease Cherry
In this randomized, single-blind, placebo-controlled, parallel-arm pilot clinical trial, 19 men and women aged between 20 to 60 years who have metabolic syndrome participated. They were assigned to consume either 240ml of tart cherry juice or an isocaloric placebo-control drink twice daily for a period of 12 weeks. Initial evaluations on arterial stiffness (determined through pulse wave velocity), brachial and aortic blood pressures, wave reflection or augmentation index, and blood markers for cardiovascular and metabolic health were established as their baseline values.
Despite observing no significant alterations in hemodynamics, arterial stiffness, or other assessed blood biomarkers, there was a noted decrease in oxidized low-density lipoprotein and soluble vascular cell adhesion molecule-1 levels in the tart cherry juice group compared to the control group at the end of 12 weeks. In addition, there was a trending lower total cholesterol level in the tart cherry group versus the control at the end of the trial. These results suggest that daily tart cherry juice consumption may help decrease processes involved in the rapid progression of atherogenesis.
Almond consumption was found to significantly reduce systolic blood pressure.
2020 Journal of King Saud University - Science The effect of almonds consumption on blood pressure: A systematic review and dose-response meta-analysis of randomized control trials Li Z, Bhagavathula AS, Batavia M, Clark C, Abdulazeem HM, Rahmani J, et al.
Systematic Review Almond High Blood Pressure Systolic Blood Pressure
A systematic and dose-response meta-analysis review study was carried out. The researchers thoroughly searched through PubMed/MEDLINE, Web of Science, and Scopus, with no restrictions on time or language, up until July 2019. The goal was to identify randomized controlled trials which investigated the effects of almond consumption on systolic and diastolic blood pressure. A total of fifteen studies, with 21 arms and involving 853 participants, were selected and their findings analyzed according to the PRISMA guidelines.
Upon analysis, it was observed that the consumption of almonds displayed a significant reduction effect on systolic blood pressure. However, no such significant effect was found on diastolic blood pressure. The variation in results for diastolic blood pressure was noticed to be linked to the dose of almonds consumed, a finding made through a meta-regression analysis carried out during the study.
Daily consumption of tart cherry juice for 12 weeks showed anti-oxidative and anti-inflammatory properties which may reduce blood pressure and lower LDL cholesterol in older adults.
2019 Nutrients Effects of Tart Cherry Juice on Biomarkers of Inflammation and Oxidative Stress in Older Adults Chai S, Davis K, Zhang Z, Zha L, Kirschner K
Randomised Controlled Trial Cherry High Blood Pressure Inflammation
In the randomized-controlled clinical trial conducted, 37 participants aged between 65 and 80 were given either 480 mL of tart cherry juice or a control drink to consume daily for a span of 12 weeks. Blood biomarkers linked to inflammation and oxidative stress were analyzed both at the start and after the 12 weeks intervention.
Post the intervention period, levels of several inflammation and oxidative stress blood biomarkers in the tart cherry juice group observed notable differences compared to the control group. Particularly, a perceivable elevation in DNA repair activity coupled with a reduced mean c-reactive protein level was seen. Furthermore, a significant group effect was seen in plasma levels of c-reactive protein and malondialdehyde, with a slightly less significant effect observed for oxidized low-density lipoprotein. Post- intervention plasma levels showed a decreasing trend, with c-reactive protein, malondialdehyde, and oxidized low-density lipoprotein falling by 25%, 3%, and 11% respectively compared to the baseline values.