Consumption of a High-fiber Diet Improves Systolic Blood Pressure and Vascular Endothelial Function and May Reduce Oxidative Stress in Middle-aged to Older Adults.

High-fiber diet consumption improves SBP in healthy MA/O adults with normal baseline levels and induces clinically significant improvements in FMD possibly via reductions in vascular oxidative stress and tonic oxidative stress-related suppression of endothelial function. These results suggest that a high-fiber diet may reduce CVD risk, at least in part, by mitigating increases in SBP and oxidative stress-related impairments in endothelial function with aging.