Cited by 170Ovarian function and disordersDiabetes, Cardiovascular Risks, and LipoproteinsDiet, Metabolism, and Disease

Role of Diet in the Treatment of Polycystic Ovary Syndrome

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Douglas, Crystal C., Gower, Barbara A., Darnell, Betty E., Ovalle, Fernando, Oster, Robert A., Azziz, Ricardo·2006·Fertility and Sterility

Abstract

Objective To determine whether eucaloric diets either enriched with monounsaturated fatty acids (MUFA; 17% energy) or low in carbohydrates (Low CHO; 43% energy) would increase insulin sensitivity (Si) and decrease circulating insulin concentrations, relative to a standard diet (STD; 56% CHO, 31% fat, 16% protein), among women with polycystic ovary syndrome (PCOS).Design Crossover.Setting Academic research environment.Patient(s) Healthy women with PCOS not on hormonal or insulin-sensitizing therapy.Intervention(s) Subjects consumed three, 16-day, eucaloric diets, each separated by a 3-week washout period. A frequently sampled, intravenous, glucose tolerance test was administered at baseline and following each diet.Main outcome measure(s) Fasting glucose, insulin, the acute insulin response to glucose (AIRg), Si, sex hormone-binding globulin (SHBG), dehydroepiandrosterone sulfate (DHEAS), total testosterone (T), free T, A4, total cholesterol, high-density lipoprotein cholesterol (HDL-C), tryglycerides (TG), and free fatty acids (FFA).Result(s) Fasting insulin was lower following the Low CHO diet relative to the STD diet; AIRg was lower following the Low CHO diet relative to the MUFA diet. Fasting glucose, Si, and the circulating concentrations of reproductive hormones were not significantly affected by the intervention.Conclusion(s) A moderate reduction in dietary carbohydrate reduced the fasting and postchallenge insulin concentrations among women with PCOS, which, over time, may improve reproductive/endocrine outcomes.

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Crossref · 10.1016/j.fertnstert.2005.08.045

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  • After use of low-GI, high-fiber diets for certain periods, women with PCOS had menstrual periods on schedule and lower blood sugar than women on a high-GI diet.

    “Douglas et al. (2006) stated that after the use of low-GI, high-fiber diets for certain periods with PCOS, the women had their menstrual periods at the schedule, and their blood sugar was less than the women who had high-GI diet [81].”

    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 Douglas et al. (2006)

    The Abstract and Discussion report that, after 16-day low-carbohydrate diets, fasting glucose was not significantly affected, although the lowest observed concentrations followed the low-carbohydrate diet. The study compared low-carbohydrate, high-MUFA, and standard diets—not low- and high-GI diets—and did not report scheduled menstrual periods. (LLM, conf=0.88)

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  • After use of low-GI, high-fiber diets for certain periods, women with PCOS had menstrual periods on schedule and lower blood sugar than women on a high-GI diet.

    “Douglas et al. (2006) stated that after the use of low-GI, high-fiber diets for certain periods with PCOS, the women had their menstrual periods at the schedule, and their blood sugar was less than the women who had high-GI diet [81].”

    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 [81]

    The Discussion (page unavailable) says the 16-day low-carbohydrate diet had no treatment effect on fasting glucose, although glucose concentrations were lowest after that diet. The study compared low-carbohydrate, standard, and MUFA diets—not low- versus high-GI diets—and did not report that menstrual periods became regular. (LLM, conf=0.88)

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  • A low-carbohydrate diet serving 43% of total caloric intake over 16 days resulted in notable decreases in fasting and post-exercise insulin levels.

    “A low-carbohydrate diet serving 43% of total caloric intake over 16 days resulted in notable decreases in fasting and post-exercise insulin levels, implying a promising short-term dietary manipulation [81].”

    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 [81]

    The Abstract (page unavailable) describes a 16-day diet providing 43% of energy from carbohydrate and reports lower fasting insulin. It reports lower insulin after a glucose challenge, not after exercise; the glucose-tolerance-test methods (page unavailable) confirm that the challenge was intravenous glucose. (LLM, conf=0.90)

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  • All low-carbohydrate studies were designed to be eucaloric and found a low-CHO diet to lower fasting insulin, glucose, total cholesterol, LDL-C concentrations, HOMA-IR, and area under the curve insulin, as well as to improve insulin sensitivity in individuals with PCOS.

    “All of the studies were designed to be eucaloric and found a low-CHO diet to lower fasting insulin [72,73,74], glucose [73], total cholesterol [72,73], LDL-C concentrations [73,74], HOMA-IR [73], and area under the curve insulin [74], as well as to improve insulin sensitivity [73] in individuals with PCOS.”
  • Studies that modified dietary patterns without a caloric deficit saw improvements in cardiometabolic risk factors.

    “studies that modified dietary patterns without a caloric deficit [72,73,74,75,76,77,78,79,80,81,82,83,84,85,87,108] saw improvements in cardiometabolic risk factors”

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Research works printed but not linked: 2

  1. Plymate SR, Matej LA, Jones RE, Friedl KE. Inhibition of sex hormone- binding globulin production in the human hepatoma (Hep G2) cell line by insulin and prolactin. J Clin Endocrinol Metab 1988;67(3):460 -4.
  2. Lonnroth P, Smith U. Intermediary metabolism with an emphasis on lipid metabolism, adipose tissue, and fat cell metabolism: a review. In: Bjorntorp P, Brodoff BN, eds. Obesity. Philadelphia: Lippincott, 1992:3-14.

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Authors
Douglas, C. C., Gower, B. A., Darnell, B. E., Ovalle, F., Oster, R. A., & Azziz, R.
Affiliations
  • University of Alabama at Birmingham (US)
  • Cedars-Sinai Medical Center (US)
Corresponding author
Douglas, Crystal C.
Venue
Fertility and Sterility
Publisher
Elsevier BV
Published
2006-03
Volume
85
Issue
3
Pages
679-688
ISSN
0015-0282 (ISSN-L)
OpenAlex
W1989626510
Cited by
170
References
49
Citations by year
2026: 4 · 2025: 4 · 2024: 8 · 2023: 15 · 2022: 6 · 2021: 10 · 2020: 16 · 2019: 8 · 2018: 8 · 2017: 10 · 2016: 6 · 2015: 7 · 2014: 8 · 2013: 10 · 2012: 10
FWCI
10.23
Type
journal article
Language
en
Open access
Locations
  • Fertility and Sterility (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (RR00032)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30-DK56336, P30DK056336)
  • National Center for Research Resources (M01RR00032, M01RR000032)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD029364, K24-HD011346, R01-HD29364)
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, dietary intervention, low-carbohydrate diet, monounsaturated fatty acids, insulin sensitivity, insulin resistance, acute insulin response, sex hormone-binding globulin, testosterone, dehydroepiandrosterone sulfate, glucose tolerance, eucaloric diet
MeSH terms
Adult, Body Composition, Diet, Dietary Carbohydrates, Endocrine Glands, Fasting, Fatty Acids, Monounsaturated, Female, Glucose, Humans, Insulin, Insulin Resistance, Osmolar Concentration, Polycystic Ovary Syndrome, Cross-Over Studies

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