Supplementation With Vitamins C and E Improves Arterial Stiffness and Endothelial Function in Essential Hypertensive Patients

Department of Internal Medicine, University of Pisa, Pisa, Italy.
American Journal of Hypertension (Impact Factor: 2.85). 05/2007; 20(4):392-7. DOI: 10.1016/j.amjhyper.2006.09.021
Source: PubMed

ABSTRACT Essential hypertension is characterized by endothelial dysfunction, arterial stiffness, and increased oxidative stress. We evaluated the effect of short-term combined treatment with the antioxidants vitamins C and E on endothelial function, arterial stiffness, and oxidative stress in untreated essential hypertensive patients.
A randomized, double-blind, placebo-controlled, crossover study design was used to assign 30 male essential hypertensive patients to either vitamin C (1 g) and vitamin E (400 IU) or placebo for 8 weeks. Endothelium-dependent response was assessed as flow-mediated dilation (FMD) of the brachial artery. Arterial stiffness was assessed as central pulse wave velocity (PWV) and augmentation index (AIx). Plasma markers of oxidative stress and antioxidant status were measured.
After vitamin supplementation, FMD was significantly improved. Central PWV was significantly reduced, while AIx tended to decrease. Plasma vitamin levels and antioxidant capacity increased significantly. Levels of oxidative stress decreased. Changes in central PWV were related to changes in levels of oxidative stress.
Combined treatment with vitamins C and E has beneficial effects on endothelium-dependent vasodilation and arterial stiffness in untreated, essential hypertensive patients. This effect is associated with changes in plasma markers of oxidative stress.

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Available from: Ferdinando Franzoni, Sep 28, 2015
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    • "Previous studies have suggested that antioxidant vitamins C and E improve vascular defense against oxidative stress by reducing free radicals and protecting NO from inactivation, thereby exerting beneficial effects on vascular function and structure [11,31]. Especially, combined administration of vitamins C and E significantly increases endothelium-dependent vasodilation, while monotherapy with vitamin C alone is ineffective [30,31,35]. "
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