Cited by 84Cardiovascular Health and Disease PreventionDiet and metabolism studiesCardiovascular Function and Risk Factors

Benefit of Low-Fat Over Low-Carbohydrate Diet on Endothelial Health in Obesity

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Phillips, Shane A., Jurva, Jason W., Syed, Amjad Q., Syed, Amina Q., Kulinski, Jacquelyn P., Pleuss, Joan, Hoffmann, Raymond G., Gutterman, David D.·2008·Hypertension

Abstract

Obesity is associated with impaired endothelial-dependent flow-mediated dilation, a precursor to hypertension and atherosclerosis. Although dieting generally improves cardiovascular risk factors, the direct effect of different dietary strategies on vascular endothelial function is not known. The purpose of this study was to test the hypothesis that a low-fat (LF) diet improves endothelial function compared with an isocaloric low-carbohydrate (LC) diet. Obese (n=20; body mass index: 29 to 39; mean systolic blood pressure: 107 to 125 mm Hg) and otherwise healthy volunteers were randomly assigned to either the American Heart Association modeled LF (30% fat calories) diet or an isocaloric LC Atkins’ style diet (20 g of carbohydrates) for 6 weeks (4-week weight loss and 2-week maintenance phase). Brachial flow-mediated dilation and dilation to nitroglycerin were measured with ultrasound using automated edge detection technology (baseline, week 2, and week 6). Blood pressure, weight loss, and cholesterol profiles were measured throughout the study. Weight loss was similar in LF (100±4 to 96.1±4 kg; P <0.001) and LC (95.4±4 to 89.7±4 kg; P <0.001) diets. Blood pressure decreased similarly in both groups (LF: 8/5 mm Hg; LC: 12/6 mm Hg) at 6 weeks. After 6 weeks, the percentage of flow-mediated dilation improved (1.9±0.8; P <0.05) in the LF diet but was reduced in the LC diet (−1.4±0.6; P <0.05) versus baseline. Dilation to nitroglycerin and lipid panels was similar at 0, 2, and 6 weeks. Despite similar degrees of weight loss and changes blood pressure, LF diets improved brachial artery flow-mediated dilation over LC diets. LF diets may confer greater cardiovascular protection than LC diets.

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Crossref · 10.1161/hypertensionaha.107.101824

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Authors
Phillips, S. A., Jurva, J. W., Syed, A. Q., Syed, A. Q., Kulinski, J. P., Pleuss, J., Hoffmann, R. G., & Gutterman, D. D.
Affiliations
Medical College of Wisconsin (US)
Venue
Hypertension
Published
2008-02
Volume
51
Issue
2
Pages
376-382
ISSN
  • 0194-911X (ISSN-L)
  • 1524-4563
OpenAlex
W2172290424
Cited by
84
References
43
Citations by year
2026: 2 · 2025: 5 · 2024: 4 · 2023: 4 · 2021: 4 · 2020: 2 · 2019: 3 · 2018: 2 · 2017: 2 · 2016: 3 · 2015: 6 · 2014: 9 · 2013: 12 · 2012: 1
FWCI
5.84
Type
journal article
Language
en
Open access
Locations
  • Hypertension (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Heart, Lung, and Blood Institute (R01HL095701, K23HL085614)
  • National Center for Research Resources (MO1RR00058, M01RR000058)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
  • Health Sciences › Medicine › Physiology › Diet and metabolism studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Function and Risk Factors
Keywords
obesity, low-fat diet, low-carbohydrate diet, Atkins diet, endothelial function, flow-mediated dilation, brachial artery, weight loss, blood pressure, cardiovascular risk, dietary fat restriction
MeSH terms
Adult, Blood Pressure, Brachial Artery, Endothelium, Vascular, Fasting, Female, Nitroglycerin, Humans, Insulin, Lipids, Male, Obesity, Regional Blood Flow, Ultrasonography, Vasodilation, Vasodilator Agents, Weight Loss, Diet, Fat-Restricted, Diet, Carbohydrate-Restricted

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