Abstract
BACKGROUND: Through effects on nitric oxide (NO) bioavailability, endothelial function is improved after the intake of beetroot juice-which is rich in inorganic nitrate-, but decreased after the intake of a meal. OBJECTIVE: The objective of this study was to examine if beetroot juice could counteract the impairment of endothelial function associated with the ingestion of a mixed meal. METHODS: Twenty healthy overweight and slightly obese men with a BMI between 28 and 35 kg/m(2) received in random order a mixed meal providing 56.6 g of fat with beetroot juice or a control drink. The beetroot juice (140 mL) provided approximately 500 mg dietary nitrate. Flow-mediated dilation (FMD) of the brachial artery was measured before and 2 h after meal consumption. Blood was sampled at regular intervals. RESULTS: Postprandial changes in serum triacylglycerol (TAG) (P = 0.69), plasma glucose (P = 0.84) and insulin (P = 0.67) concentrations were comparable between the meals. After consumption of beetroot juice, the postprandial impairment in FMD following a standardized mixed meal was improved (P = 0.030) compared with the control drink (-0.37 +/- 2.92% versus -1.56 +/- 2.90%). Following beetroot juice consumption, plasma concentrations of the circulating NO pool were higher at T60, T120, and T240 (P < 0.001 at all time points). CONCLUSION: In healthy overweight and slightly obese men a single dose of beetroot juice attenuates the postprandial impairment of FMD following a mixed meal, possibly through increases in plasma NO concentrations.
Original language | English |
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Pages (from-to) | 78-83 |
Number of pages | 6 |
Journal | Atherosclerosis |
Volume | 231 |
Issue number | 1 |
DOIs | |
Publication status | Published - Nov 2013 |
Keywords
- Beetroot juice
- Inorganic nitrate
- Endothelial dysfunction
- Flow-mediated dilation
- Postprandial lipemia
- HIGH-FAT MEAL
- HEALTHY-MEN
- DEPENDENT VASODILATION
- INORGANIC NITRATE
- BRACHIAL-ARTERY
- NITRIC-OXIDE
- PERIPHERAL VASODILATION
- DIETARY NITRATE
- BLOOD-PRESSURE
- HUMANS