Cited by 142Diet and metabolism studiesDietary Effects on HealthNutritional Studies and Diet

Protein in optimal health: heart disease and type 2 diabetes

Open access
Layman, Donald K, Clifton, Peter, Gannon, Mary C, Krauss, Ronald M, Nuttall, Frank Q·2008·The American Journal of Clinical Nutrition

Abstract

Diets with increased protein and reduced carbohydrates have been shown to improve body composition, lipid and lipoprotein profiles, and glycemic regulations associated with treatment of obesity and weight loss. Derived from these outcomes, high-protein, low-carbohydrate diets are also being examined for treatment of heart disease, metabolic syndrome, and type 2 diabetes. High-protein, low-carbohydrate diets have been found to have positive effects on reducing risk factors for heart disease, including reducing serum triacylglycerol, increasing HDL cholesterol, increasing LDL particle size, and reducing blood pressure. These diets appear particularly attractive for use with individuals exhibiting the atherogenic dyslipidemia of metabolic syndrome. High-protein, low-carbohydrate diets have also been investigated for treatment of type 2 diabetes with positive effects on glycemic regulation, including reducing fasting blood glucose, postprandial glucose and insulin responses, and the percentage of glycated hemoglobin. Specific effects of increasing protein compared with reducing carbohydrates have not been extensively investigated. Additional research is needed to determine specific levels of protein, carbohydrate, and fat for optimum health of individuals who differ in age, physical activity, and metabolic phenotypes.

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  • Dietary protein intake may increase insulin secretion and should not be used to treat hypoglycemia.

    “Dietary protein intake may increase insulin secretion and should not be used to treat hypoglycemia (136).”

    From 6. Glycemic Goals, Hypoglycemia, and Hyperglycemic Crises: Standards of Care in Diabetes-2026. (2026) · cites this paper as [136]

    The section “Protein Intake, Glucose Homeostasis, and Type 2 Diabetes” (pp. 1–4) says dietary protein can stimulate insulin release, particularly in people with type 2 diabetes. It does not address whether protein should be used to treat hypoglycemia (searched: hypoglycemia, treating low blood glucose), so the treatment recommendation is unsupported. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • In individuals with type 2 diabetes, protein intake may enhance or increase the insulin response to dietary carbohydrates.

    “In individuals with type 2 diabetes, protein intake may enhance or increase the insulin response to dietary carbohydrates (199).”
  • In type 2 diabetes, ingested protein may increase insulin response without increasing plasma glucose concentrations.

    “In type 2 diabetes, ingested protein may increase insulin response without increasing plasma glucose concentrations (101).”

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Research works printed but not linked: 4

  1. [1]1. Keys A. Seven countries. Cambridge, MA: Harvard University Press, 1980.
  2. [4]4. Appel L, Sacks F, Carry V, et al. for the OmniHeart Collaborative Research Group. Effects of protein, monounsaturated fat, and carbohy- drate intake on blood pressure and serum lipids. JAMA 2005;294:2455- 64.
  3. [37]37. Austin MA, King MC, Vranizan KM, Krauss RM. Atherogenic lipopro- tein profile. Circ 1990;82:495-506.
  4. [53]53. Reaven GM. Do high carbohydrate diets prevent the development or attenuate the manifestations (or both) of syndrome X? Curr Opin Lipidol 1997;8:23-7.

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Authors
Layman, D. K., Clifton, P., Gannon, M. C., Krauss, R. M., & Nuttall, F. Q.
Affiliations
  • University of Illinois Urbana-Champaign (US)
  • Commonwealth Scientific and Industrial Research Organisation (AU)
  • United States Department of Veterans Affairs (US)
  • UCSF Benioff Children's Hospital (US)
Corresponding author
Layman, Donald K
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2008-05
Volume
87
Issue
5
Pages
1571S-1575S
ISSN
0002-9165 (ISSN-L)
OpenAlex
W1872792734
Cited by
142
References
70
Citations by year
2026: 5 · 2025: 6 · 2024: 4 · 2023: 5 · 2022: 2 · 2021: 4 · 2020: 7 · 2019: 9 · 2018: 9 · 2017: 8 · 2016: 9 · 2015: 12 · 2014: 8 · 2013: 9 · 2012: 8
FWCI
7.86
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • PubMed (publishedVersion)
  • Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion)
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
high-protein low-carbohydrate diet, heart disease, type 2 diabetes, metabolic syndrome, dyslipidemia, HDL cholesterol, LDL particle size, blood pressure, glycemic regulation, insulin response, atherogenic dyslipidemia, obesity, weight loss
MeSH terms
Blood Glucose, Blood Pressure, Cholesterol, Diabetes Mellitus, Type 2, Dietary Proteins, Heart Diseases, Humans, Weight Loss, Lipid Metabolism, Diet, Carbohydrate-Restricted

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