Cited by 118Ovarian function and disordersDiabetes, Cardiovascular Risks, and LipoproteinsDiet, Metabolism, and Disease

A Comparison of a Pulse-Based Diet and the Therapeutic Lifestyle Changes Diet in Combination with Exercise and Health Counselling on the Cardio-Metabolic Risk Profile in Women with Polycystic Ovary Syndrome: A Randomized Controlled Trial

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Kazemi, Maryam, McBreairty, Laura E., Chizen, Donna R., Pierson, Roger A., Chilibeck, Philip D., Zello, Gordon A.·2018·Nutrients

Abstract

We compared the effects of a low-glycemic index pulse-based diet, containing lentils, beans, split peas, and chickpeas, to the Therapeutic Lifestyle Changes (TLC) diet on cardio-metabolic measures in women with polycystic ovary syndrome (PCOS). Ninety-five women (18–35 years) enrolled in a 16-week intervention; 30 women in the pulse-based and 31 in the TLC groups completed the study. Women participated in aerobic exercise training (minimum 5 days/week for 45 min/day) and were counselled (monthly) about PCOS and lifestyle modification. Women underwent longitudinal follow-up post-intervention. The pulse-based group had a greater reduction in total area under the curve for insulin response to a 75-g oral glucose tolerance test (mean change ± SD: −121.0 ± 229.9 vs. −27.4 ± 110.2 µIU/mL × min; p = 0.05); diastolic blood pressure (−3.6 ± 6.7 vs. −0.2 ± 6.7 mmHg, p = 0.05); triglyceride (−0.2 ± 0.6 vs. 0.0 ± 0.5 mmol/L, p = 0.04); low-density lipoprotein cholesterol (−0.2 ± 0.4 vs. −0.1 ± 0.4 mmol/L, p = 0.05); total cholesterol/high-density lipoprotein cholesterol (TC/HDL-C; −0.4 ± 0.4 vs. 0.1 ± 0.4, p < 0.001); and a greater increase in HDL-C (0.1 ± 0.2 vs. −0.1 ± 0.2 mmol/L, p < 0.01) than the TLC group. Decreased TC/HDL-C (p = 0.02) at six-month and increased HDL-C and decreased TC/HDL-C (p ≤ 0.02) at 12-month post-intervention were maintained in the pulse-based group. A pulse-based diet may be more effective than the TLC diet at improving cardio-metabolic disease risk factors in women with PCOS. Trial registration: CinicalTrials.gov identifier, NCT01288638.

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Crossref · 10.3390/nu10101387

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  • A low glycemic index diet based on pulses can lead to improvement of fasting insulin and decrease of inflammatory markers in women with PCOS.

    “The study by Kazemi et al. (2018) then provided some substantiation of the fact that the low glycemic index diet, based on pulses, can lead to the improvement of fasting insulin and the decrease of inflammatory markers in case women who have PCOS take it [130].”

    From Nutritional and herbal interventions for polycystic ovary syndrome (PCOS): a comprehensive review of dietary approaches, macronutrient impact, and herbal medicine in management (2025) · cites this paper as [130]

    Results §3.4 (page unavailable) reports that fasting insulin decreased during the intervention, but the decrease did not differ between the pulse-based and TLC diet groups. Methods §§2.4–2.5 (pages unavailable) says the study measured hsCRP, an inflammatory marker; the passages reviewed do not report a decrease in it or other inflammatory markers. The claim therefore supports the fasting-insulin outcome, but not the attributed decrease in inflammatory markers. (LLM, conf=0.87)

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  • A low glycemic index diet based on pulses can lead to improvement of fasting insulin and decrease of inflammatory markers in women with PCOS.

    “The study by Kazemi et al. (2018) then provided some substantiation of the fact that the low glycemic index diet, based on pulses, can lead to the improvement of fasting insulin and the decrease of inflammatory markers in case women who have PCOS take it [130].”

    From Nutritional and herbal interventions for polycystic ovary syndrome (PCOS): a comprehensive review of dietary approaches, macronutrient impact, and herbal medicine in management (2025) · cites this paper as Kazemi et al. (2018)

    Results §3.4 reports that fasting insulin decreased during the 16-week intervention in women with PCOS, but the decrease did not differ between the pulse-based and TLC diet groups. Methods §2.4 lists hsCRP as a measured inflammatory marker, but the passages from our copy do not report a decrease in inflammatory markers. The study also combined diet with exercise and counselling, so it does not isolate the diet’s effect. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • At 12 months, only the increased HDL-C concentrations and lower total cholesterol/HDL-C ratio stayed improved in the pulse-based group, while other improvements returned to pre-intervention levels.

    “At 12 months, only the increased HDL-C concentrations and lower total cholesterol/HDL-C ratio stayed improved in the pulse-based group. Other improvements in cardiometabolic risk returned to pre-intervention levels [108].”

    From Moving beyond Weight: A Narrative Review of the Dietary and Lifestyle Management for Reducing Cardiometabolic Risk in Polycystic Ovary Syndrome (PCOS) (2023) · cites this paper as [108]

    Results §3.8 reports that, in the pulse-based group, HDL-C remained higher and the total cholesterol/HDL-C ratio remained lower than baseline at 12 months. The Discussion says other cardiometabolic measures tended to revert toward pre-intervention levels, but Results §3.8 also reports no significant change from 16 weeks to 12 months in several measures. Thus, saying all other improvements returned to pre-intervention levels overstates the findings. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Initial changes to cardiometabolic risk in both the pulse-based and therapeutic lifestyle changes groups included a decrease in BMI, WC, systolic blood pressure, glucose, insulin, and total cholesterol concentrations.

    “Initial changes to cardiometabolic risk included a decrease in BMI, WC, systolic blood pressure (SBP), glucose, insulin, and total cholesterol concentrations in both the pulse-based and therapeutic lifestyle changes groups”
  • Many lifestyle intervention studies lacked a comparison group, had a small sample size, suffered from high attrition rates, and did not report on the length of duration.

    “Many studies lacked a comparison group [100,105,110,111,112], had a small sample size [105,109,110,112,113], suffered from high attrition rates [100,108,113], and did not report on the length of duration [105]”

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Cites

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2 of the 115 references couldn’t be matched to a known paper.

Research works printed but not linked: 3

  1. [38]World Health Organization Preventing and Managing the Global Epidemic WHO Technical Report Series 894 World Health Organization Geneva, Switzerland 2000 1 252 924-120-894-5 11234459
  2. [76]Frost G. Dornhorst A. Glycemic Index Encyclopedia of Human Nutrition 3rd ed. Caballero B. Allen L. Prentice A. Academic Press Waltham, MD, USA 2012 393 398 978-012-384-885-7
  3. [93]Otten J.J. Hellwig J.P. Meyers L.D. DRI, Dietary Reference Intakes: The Essential Guide to Nutrient Requirements National Academies Press Washington, DC, USA 2006 1 1344 978-030-915-742-1

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Authors
Kazemi, M., McBreairty, L. E., Chizen, D. R., Pierson, R. A., Chilibeck, P. D., & Zello, G. A.
Affiliations
University of Saskatchewan (CA)
Corresponding author
Zello, Gordon A.
Venue
Nutrients
Publisher
MDPI AG
Published
2018-09-30
Volume
10
Issue
10
Pages
1387
ISSN
2072-6643 (ISSN-L)
OpenAlex
W2893962441
Cited by
118
References
115
Citations by year
2026: 14 · 2025: 15 · 2024: 15 · 2023: 19 · 2022: 11 · 2021: 21 · 2020: 17 · 2019: 6
FWCI
11.80
Type
journal article
Language
en
Open access
Locations
  • Nutrients (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Agriculture and Agri-Food Canada (G00011676)
  • Saskatchewan Pulse Growers (G00014962 - SPCD - Effect of a Pulse-Based Diet)
  • Canada Foundation for Innovation (29638)
  • Colleges of Graduate and Postdoctoral Studies and Pharmacy and Nutrition Scholarships and Awards (University of Saskatchewan, Canada)
  • Saskatchewan Health Research Foundation (Saskatchewan, Canada)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
Keywords
polycystic ovary syndrome, low glycemic index diet, aerobic exercise training, health counseling, lifestyle modification, cardiometabolic risk, insulin resistance, HDL cholesterol, TC/HDL-C ratio, triglycerides, blood pressure, LDL cholesterol, women's health, dietary intervention, lifestyle intervention
MeSH terms
Adolescent, Adult, Blood Glucose, Cardiovascular Diseases, Counseling, Diet, Female, Humans, Insulin, Insulin Resistance, Fabaceae, Life Style, Lipids, Metabolic Diseases, Polycystic Ovary Syndrome, Risk Factors, Exercise, Single-Blind Method, Lens Plant, Glycemic Index

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