Cited by 144Diet and metabolism studiesNutritional Studies and DietDiet, Metabolism, and Disease

Low-carbohydrate diets and cardiometabolic health: the importance of carbohydrate quality over quantity

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Sievenpiper, John L·2020·Nutrition Reviews

Abstract

Carbohydrates are increasingly being implicated in the epidemics of obesity, diabetes, and their downstream cardiometabolic diseases. The “carbohydrate-insulin model” has been proposed to explain this role of carbohydrates. It posits that a high intake of carbohydrate induces endocrine deregulation marked by hyperinsulinemia, leading to energy partitioning with increased storage of energy in adipose tissue resulting in adaptive increases in food intake and decreases in energy expenditure. Whether all carbohydrate foods under real-world feeding conditions directly contribute to weight gain and its complications or whether this model can explain these clinical phenomena requires close inspection. The aim of this review is to assess the evidence for the role of carbohydrate quantity vs quality in cardiometabolic health. Although the clinical investigations of the “carbohydrate-insulin model” have shown the requisite decreases in insulin secretion and increases in fat oxidation, there has been a failure to achieve the expected fat loss under low-carbohydrate feeding. Systematic reviews with pairwise and network meta-analyses of the best available evidence have failed to show the superiority of low-carbohydrate diets on long-term clinical weight loss outcomes or that all sources of carbohydrate behave equally. High-carbohydrate diets that emphasize foods containing important nutrients and substances, including high-quality carbohydrate such as whole grains (especially oats and barley), pulses, or fruit; low glycemic index and load; or high fiber (especially viscous fiber sources) decrease intermediate cardiometabolic risk factors in randomized trials and are associated with weight loss and decreased incidence of diabetes, cardiovascular disease, and cardiovascular mortality in prospective cohort studies. The evidence for sugars as a marker of carbohydrate quality appears to be highly dependent on energy control (comparator) and food source (matrix), with sugar-sweetened beverages providing excess energy showing evidence of harm, and with high-quality carbohydrate food sources containing sugars such as fruit, 100% fruit juice, yogurt, and breakfast cereals showing evidence of benefit in energy-matched substitutions for refined starches (low-quality carbohydrate food sources). These data reflect the current shift in dietary guidance that allows for flexibility in the proportion of macronutrients (including carbohydrates) in the diet, with a focus on quality over quantity and dietary patterns over single nutrients.

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Crossref · 10.1093/nutrit/nuz082

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  • The Legume-Nut dietary pattern's high carbohydrate and sugar content, particularly from potatoes and certain legumes, may lead to rapid blood sugar spikes in the absence of sufficient dietary fiber, increasing metabolic syndrome risk.

    “This diet is predominantly characterized by a high intake of carbohydrates and sugars, particularly from potatoes and certain legumes that naturally contain significant amounts of starches and sugars [29,30]. In the absence of sufficient dietary fiber to mitigate these effects, there is an elevated risk of rapid blood sugar spikes [31].”

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Authors
Sievenpiper, J. L.
Affiliations
St. Michael's Hospital (CA)
Corresponding author
Sievenpiper, John L
Venue
Nutrition Reviews
Published
2020-07-30
Volume
78
Issue
Supplement_1
Pages
69-77
ISSN
  • 0029-6643 (ISSN-L)
  • 1753-4887
OpenAlex
W3046587057
Cited by
144
References
111
Citations by year
2026: 21 · 2025: 29 · 2024: 32 · 2023: 23 · 2022: 19 · 2021: 18 · 2020: 1 · 2019: 1
FWCI
1.15
Type
journal article
Language
en
Open access
Locations
  • Nutrition Reviews (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • PepsiCo, Nestlé, Wilmar, Amway, McDonald's, and Starbucks
  • Canadian Foundation for Innovation, Ontario Research Fund
  • Province of Ontario Ministry of Research and Innovation and Science
  • Canadian Institutes of Health Research
  • CIHR
  • Diabetes Canada, PSI Foundation, Banting & Best Diabetes Centre
  • American Society for Nutrition
  • Dried Fruit Council Foundation
  • National Dried Fruit Trade Association
  • Tate & Lyle Nutritional Research Fund
  • University of Toronto
  • Glycemic Control and Cardiovascular Disease in Type 2 Diabetes Fund
  • Nutrition Trialists Fund at the University of Toronto
Topics
  • Health Sciences › Medicine › Physiology › Diet and metabolism studies
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
low-carbohydrate diet, carbohydrate quality, cardiometabolic health, hyperinsulinemia, weight loss, dietary fiber, viscous fiber, whole grains, oat, barley, pulses, fruits, low glycemic index, sugar-sweetened beverages, diabetes mellitus, cardiovascular disease, obesity, energy expenditure, fat oxidation
MeSH terms
Cardiovascular Diseases, Diabetes Mellitus, Dietary Carbohydrates, Dietary Fiber, Humans, Insulin, Obesity, Glycemic Index, Diet, Carbohydrate-Restricted

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