Cited by 87Diet and metabolism studiesDietary Effects on HealthNutritional Studies and Diet

Effects of a carbohydrate-restricted diet with and without supplemental soluble fiber on plasma low-density lipoprotein cholesterol and other clinical markers of cardiovascular risk

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Wood, Richard J., Fernandez, Maria Luz, Sharman, Matthew J., Silvestre, Ricardo, Greene, Christine M., Zern, Tosca L., Shrestha, Sudeep, Judelson, Daniel A. +3 more·2007·Metabolism

Abstract

Carbohydrate-restricted diets (CRDs) promote weight loss, reductions in plasma triacylglycerol (TAG) levels, and increases in high-density lipoprotein cholesterol (HDL-C) levels but may cause undesirable low-density lipoprotein cholesterol (LDL-C) responses in some people. The objective of the present study was to determine the effect of adding soluble fiber to a CRD on plasma LDL-C and other traditionally measured markers of cardiovascular disease. Using a parallel-arm, double-blind, placebo-controlled design, 30 overweight and obese men (body mass index, 25-35 kg/m(2)) were randomly assigned to supplement a CRD with soluble fiber (Konjac-mannan, 3g/d) (n = 15) or placebo (n = 15). Plasma lipids, anthropometrics, body composition, blood pressure, and nutrient intake were evaluated at baseline and at 6 and 12 weeks. Compliance was excellent as assessed by 7-day weighed dietary records and ketonuria. Both groups experienced decreases in (P < .01) body weight, percent body fat, systolic blood pressure, waist circumference, and plasma glucose levels. After 12 weeks, HDL-C and TAG improved significantly in the fiber (10% and -34%) and placebo (14%, -43%) groups. LDL-C decreased by 17.6% (P < .01) at week 6 and 14.1% (P < .01) at week 12 in the fiber group. Conversely, LDL-C reductions were significant in the placebo group only after 12 weeks (-6.0%, P < .05). We conclude that although clearly effective at lowering LDL-C, adding soluble fiber to a CRD during active and significant weight loss provides no additional benefits to the diet alone. Furthermore, a CRD led to clinically important positive alterations in cardiovascular disease risk factors.

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Crossref · 10.1016/j.metabol.2006.08.021

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Authors
Wood, R. J., Fernandez, M. L., Sharman, M. J., Silvestre, R., Greene, C. M., Zern, T. L., Shrestha, S., Judelson, D. A., Gomez, A. L., Kraemer, W. J., & Volek, J. S.
Affiliations
University of Connecticut (US)
Corresponding author
Wood, Richard J.
Venue
Metabolism
Publisher
Elsevier BV
Published
2007-01
Volume
56
Issue
1
Pages
58-67
ISSN
0026-0495 (ISSN-L)
OpenAlex
W2058161009
Cited by
87
References
49
Citations by year
2026: 1 · 2025: 5 · 2024: 6 · 2023: 1 · 2022: 4 · 2021: 5 · 2020: 6 · 2019: 4 · 2018: 1 · 2017: 8 · 2016: 3 · 2015: 4 · 2014: 6 · 2013: 5 · 2012: 2
FWCI
3.98
Type
journal article
Language
en
Open access
Locations
  • Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • eCite Digital Repository (University of Tasmania) (submittedVersion)
  • Research Online (Edith Cowan University) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
University of Connecticut
Topics
  • Health Sciences › Medicine › Physiology › Diet and metabolism studies
  • Health Sciences › Medicine › Physiology › Dietary Effects on Health
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
Keywords
low-carbohydrate diet, soluble dietary fiber, konjac mannan, LDL cholesterol, HDL cholesterol, plasma triglycerides, cardiovascular risk factors, weight loss, obesity, overweight men, blood pressure, ketonuria, dietary adherence
MeSH terms
Adult, Aged, Blood Glucose, Blood Pressure, Body Composition, Body Weight, Cardiovascular Diseases, Dietary Fiber, Double-Blind Method, Humans, Insulin, Cholesterol, HDL, Cholesterol, LDL, Male, Mannans, Middle Aged, Triglycerides, Diet, Carbohydrate-Restricted

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