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Mayo Clinic study shows chardonnay seeds improved endothelial function –A New Supplement?

Eur J Nutr. 2020 Feb 17.
The effect of polyphenol-rich chardonnay seed supplements on peripheral endothelial function.
Corban MT1, Widmer RJ1, Cilluffo R1, Kazeck MA1, Lennon RJ2, Lerman LO1,3, Lerman A4.
1 Department of Cardiovascular Diseases, Mayo Clinic College of Medicine and Science, 200 First Street SW, Rochester, MN, 55905, USA.
2 Department of Biomedical Statistics and Informatics, Mayo Clinic College of Medicine and Science, Rochester, MN, USA.
3 Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic College of Medicine and Science, Rochester, MN, USA.
4 Department of Cardiovascular Diseases, Mayo Clinic College of Medicine and Science, 200 First Street SW, Rochester, MN, 55905, USA. lerman.amir@mayo.edu.
Abstract
OBJECTIVE:
Peripheral endothelial dysfunction (PED) is associated with major adverse cardiovascular events. Similar to cardio-protective Mediterranean diet, Chardonnay seeds are rich in polyphenols, fibers, and grape seed oil. In this randomized double-blinded trial, we investigated safety and incremental benefit of Chardonnay seed polyphenols-rich (PR), compared to polyphenols-free (PF), supplements on PED.
METHODS:
89 patients with PED [reactive hyperemia-peripheral arterial tonometry (RH-PAT) index ≤ 2) were randomized 1:1 to 4.8 g (6 capsules)/day PR or PF for 4 months. PR and PF capsules had equal amounts of seed oil (~ 7% capsule weight), fibers, and carbohydrates, but only PR capsules contained polyphenols (~ 11% capsule weight). Baseline and follow-up RH-PAT indices (primary endpoint) and endothelial progenitor cells (EPC) levels were measured. Patients were asked to maintain their regular diet and exercise habits during study period.
RESULTS:
Baseline RH-PAT indices, demographics, lab values, and EPC levels were similar between groups. No significant adverse reactions to PR or PF were reported. Follow-up RH-PAT indices significantly increased (p < 0.05 vs. baseline) in both groups to similar extent (31 ± 39% PR vs. 49 ± 53% PF, p = 0.09). Circulating CD34 + EPCs equally increased (median + 55% vs. + 54%, p = 0.94) in PR and PF groups, respectively.
CONCLUSION:
PR and PF Chardonnay seed supplements were safe and improved peripheral endothelial function to similar extent in PED patients. However, there were no incremental benefits of PR over PF on RH-PAT indices or CD34 + EPC levels. Chardonnay seed supplements role in primary prevention of atherosclerosis, as add-on to healthy lifestyle and guidelines directed medical therapy, should be further explored.
CLINICALTRIALS. NCT02093455.
KEYWORDS:
Chardonnay seed supplements; Endothelial function; Functional foods; Vascular health
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