A ketogenic diet favorably affects serum biomarkers for cardiovascular disease in normal-weight men
Open accessAbstract
Very low-carbohydrate (ketogenic) diets are popular yet little is known regarding the effects on serum biomarkers for cardiovascular disease (CVD). This study examined the effects of a 6-wk ketogenic diet on fasting and postprandial serum biomarkers in 20 normal-weight, normolipidemic men. Twelve men switched from their habitual diet (17% protein, 47% carbohydrate and 32% fat) to a ketogenic diet (30% protein, 8% carbohydrate and 61% fat) and eight control subjects consumed their habitual diet for 6 wk. Fasting blood lipids, insulin, LDL particle size, oxidized LDL and postprandial triacylglycerol (TAG) and insulin responses to a fat-rich meal were determined before and after treatment. There were significant decreases in fasting serum TAG (-33%), postprandial lipemia after a fat-rich meal (-29%), and fasting serum insulin concentrations (-34%) after men consumed the ketogenic diet. Fasting serum total and LDL cholesterol and oxidized LDL were unaffected and HDL cholesterol tended to increase with the ketogenic diet (+11.5%; P = 0.066). In subjects with a predominance of small LDL particles pattern B, there were significant increases in mean and peak LDL particle diameter and the percentage of LDL-1 after the ketogenic diet. There were no significant changes in blood lipids in the control group. To our knowledge this is the first study to document the effects of a ketogenic diet on fasting and postprandial CVD biomarkers independent of weight loss. The results suggest that a short-term ketogenic diet does not have a deleterious effect on CVD risk profile and may improve the lipid disorders characteristic of atherogenic dyslipidemia.
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Increases in LDL cholesterol and decreases in triglycerides are common effects of low-carb diets, and have been linked with a shift in the LDL cholesterol particle size that is associated with a decreased cardiovascular risk.
“Increases in LDL cholesterol and decreases in triglycerides are common effects of low-carb diets, and have been linked with a shift in the LDL cholesterol particle size that is associated with a decreased cardiovascular risk (45–48).”
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- Authors
- Sharman, M. J., Kraemer, W. J., Love, D. M., Avery, N. G., Gómez, A. L., Scheett, T. P., & Volek, J. S.
- Affiliations
- University of Connecticut (US)
- Corresponding author
- Volek, Jeff S.
- Venue
- The Journal of Nutrition
- Publisher
- Elsevier BV
- Published
- 2002-07
- Volume
- 132
- Issue
- 7
- Pages
- 1879-1885
- ISSN
- 0022-3166 (ISSN-L)
- OpenAlex
- W2096171864
- Cited by
- 312
- References
- 43
- Citations by year
- 2026: 4 · 2025: 6 · 2024: 14 · 2023: 11 · 2022: 18 · 2021: 9 · 2020: 68 · 2019: 15 · 2018: 10 · 2017: 10 · 2016: 8 · 2015: 10 · 2014: 9 · 2013: 5 · 2012: 7
- FWCI
- 9.19
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Nutrition (publishedVersion)
- PubMed (publishedVersion)
- eCite Digital Repository (University of Tasmania) (submittedVersion)
- Figshare (submittedVersion, cc-by)
- 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
- ketogenic diet, very low carbohydrate diet, cardiovascular risk, serum biomarkers, postprandial lipemia, triglycerides, insulin, LDL particle size, oxidized LDL, HDL cholesterol, LDL cholesterol, atherogenic dyslipidemia, high-fat meal
- MeSH terms
- Adult, Body Weight, Energy Intake, Cardiovascular Diseases, Diet, Dietary Fats, Fasting, Humans, Insulin, Ketosis, Lipids, Lipoproteins, LDL, Male, Middle Aged, Reference Values, Triglycerides, Biomarkers, Postprandial Period
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