Cranberry (poly)phenol metabolites correlate with improvements in vascular function: A double-blind, randomized,...

Area of Science:

• Nutritional Science
• Cardiovascular Health
• Metabolomics

Background:

• Cranberries contain bioactive polyphenols with potential health benefits.
• Vascular function is a key indicator of cardiovascular health.

Purpose of the Study:

• To determine if cranberry juice improves vascular function in healthy men.
• To investigate the dose- and time-dependent effects of cranberry juice.
• To identify circulating polyphenol metabolites linked to vascular improvements.

Main Methods:

• Double-blind, randomized controlled crossover trial with ten healthy males.
• Assessed vascular parameters (FMD, blood pressure, PWV, AI) at multiple time points post-juice consumption.
• Analyzed plasma polyphenol metabolites using UPLC-Q-TOF MS.

Main Results:

• Cranberry juice consumption led to dose-dependent increases in flow-mediated dilation (FMD), peaking at 4 hours.
• Maximal vascular effects were observed with juice containing 1238 mg of total polyphenols.
• Sixty plasma metabolites were quantified, with twelve significantly correlating with FMD increases.

Conclusions:

• Cranberry juice polyphenols enhance vascular function in healthy males.
• Specific plasma metabolites, including ferulic acid sulfates and quercetin glucuronide, are associated with these vascular benefits.