Mediterranean Style Diet and Low Glycemic Responses

NCT ID: NCT03410719

Last Updated: 2020-07-17

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

166 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-01-04

Study Completion Date

2020-03-21

Brief Summary

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the aim of this study is to evaluate whether a Mediterranean diet rich in pasta and other starchy foods with a (Low-GI), as compared with a similar Mediterranean diet containing very little pasta and based on starchy foods with a (Hi-GI) is able to reduce insulin and glucose concentrations during a prolonged test study meal.

Detailed Description

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The overall aim of this study is to evaluate whether a Mediterranean diet rich in pasta and other starchy foods with a low glycemic response (Low-GI), as compared with a similar Mediterranean diet containing very little pasta and based on starchy foods with a high glycemic response (Hi-GI) is able to reduce insulin and glucose concentrations during a prolonged test study meal.

Conditions

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Insulin Sensitivity

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

block randomized, parallel, controlled,
Primary Study Purpose

OTHER

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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<55 (Low-GI group)

intervention weeks 1-12 the subjects in each group will be counseled to follow their weight maintaining assigned diet using a combination of prescribed menus (breakfast, lunch, and snack eating occasions) and an item specific version of the Pasta Recipe Builder (dinner). The two group-specific diet plans will mostly contain the same foods and beverages typically included in Mediterranean-style diets, except for substitutions of major sources of carbohydrate in their meals:Low-GI - pasta, barley, parboiled rice, legumes.

Group Type EXPERIMENTAL

Hi GI

Intervention Type OTHER

subjects will consume the same quantities of metabolizable CHOs (270 g/d) with 135 g of CHOs assigned to the GI intervention foods. The 135 g of CHOs will be distributed as 35 g GI breakfast product, 40 g GI lunch product, and 60 g GI dinner product. Assuming an average 2400 kcal/d total energy requirement among subjects, the 270 g/d metabolizable CHO equates to 40% of total energy intake (1080 kcal/d). One-half of daily CHO intake (135 g/d) will be the same between the Hi-GI and Low-GI groups, including CHOs in fruits, vegetables, and other foods that all subjects will consume. The other one-half of daily CHO intake (135 g) will be different between the Low-GI and Hi-GI groups. Specifically, the GI values of these foods will either be \<55 (Low-GI group) or \>70 (Hi-GI group).

>70 (Hi-GI group).

intervention weeks 1-12 the subjects in each group will be counseled to follow their weight maintaining assigned diet using a combination of prescribed menus (breakfast, lunch, and snack eating occasions) and an item specific version of the Pasta Recipe Builder (dinner). The two group-specific diet plans will mostly contain the same foods and beverages typically included in Mediterranean-style diets, except for substitutions of major sources of carbohydrate in their meals: Hi-GI - rice, potato,

Group Type EXPERIMENTAL

Hi GI

Intervention Type OTHER

subjects will consume the same quantities of metabolizable CHOs (270 g/d) with 135 g of CHOs assigned to the GI intervention foods. The 135 g of CHOs will be distributed as 35 g GI breakfast product, 40 g GI lunch product, and 60 g GI dinner product. Assuming an average 2400 kcal/d total energy requirement among subjects, the 270 g/d metabolizable CHO equates to 40% of total energy intake (1080 kcal/d). One-half of daily CHO intake (135 g/d) will be the same between the Hi-GI and Low-GI groups, including CHOs in fruits, vegetables, and other foods that all subjects will consume. The other one-half of daily CHO intake (135 g) will be different between the Low-GI and Hi-GI groups. Specifically, the GI values of these foods will either be \<55 (Low-GI group) or \>70 (Hi-GI group).

Interventions

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Hi GI

subjects will consume the same quantities of metabolizable CHOs (270 g/d) with 135 g of CHOs assigned to the GI intervention foods. The 135 g of CHOs will be distributed as 35 g GI breakfast product, 40 g GI lunch product, and 60 g GI dinner product. Assuming an average 2400 kcal/d total energy requirement among subjects, the 270 g/d metabolizable CHO equates to 40% of total energy intake (1080 kcal/d). One-half of daily CHO intake (135 g/d) will be the same between the Hi-GI and Low-GI groups, including CHOs in fruits, vegetables, and other foods that all subjects will consume. The other one-half of daily CHO intake (135 g) will be different between the Low-GI and Hi-GI groups. Specifically, the GI values of these foods will either be \<55 (Low-GI group) or \>70 (Hi-GI group).

Intervention Type OTHER

Other Intervention Names

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Low GI

Eligibility Criteria

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Inclusion Criteria

* • BMI 25-37 kg/m2 with a waist circumference \> 102 cm (males) or \> 88 cm (females) and one additional feature of Metabolic Syndrome according to ATPIII \[1\], including blood pressure \> 130/85 or treatment, fasting plasma glucose \>100mg/dL, fasting triglycerides \>150 mg/dL, HDL cholesterol \< 40 mg/dL (males) or 50 mg/dL (females),

* weight stable (± 3 kg in previous 3 mo);
* no acute illness; and non-diabetic.

Exclusion Criteria

* age \<30 and \>69years;
* fasting triglycerides ≥400 mg/dL;
* fasting cholesterol \>240 mg/dL or low-density lipoprotein cholesterol\>160 mg/dL
* fasting glucose \>126 mg/dL,
* systolic blood pressure \>160 mmHg, diastolic blood pressure \>100 mmHg
* a BMI \>37 kg/m2, weight changes during the previous 3 months (greater than ± 3 kg),
* stable intensive physical activity regimen during the previous 3 months (\>3 h/wk of moderate or high intensity exercise, resistance or aerobic training).
* cardiovascular events (myocardial infarction or stroke) during the 6 months prior to the study;
* renal and liver failure (creatinine \>1.7 mg/dl and ALT/AST \>2 times than normal values, respectively);
* anaemia (Hb \<12 g/dL);
* diabetes mellitus.
* If you are pregnant
Minimum Eligible Age

30 Years

Maximum Eligible Age

69 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Federico II University

OTHER

Sponsor Role collaborator

University of Agriculture Science, Uppsala, Sweden

UNKNOWN

Sponsor Role collaborator

Purdue University

OTHER

Sponsor Role lead

Responsible Party

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Wayne Campbell

Principal Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Gabriele Riccardi ([email protected]), M.D

Role: PRINCIPAL_INVESTIGATOR

Federico II University

Rikard Landberg (rikard.landberg@slu.), Ph.D

Role: PRINCIPAL_INVESTIGATOR

Uppsala University, Uppsala, Sweden

Locations

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Purdue University

West Lafayette, Indiana, United States

Site Status

Countries

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United States

References

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Giosue A, Skantze V, Hjorth T, Hjort A, Brunius C, Giacco R, Costabile G, Vitale M, Wallman M, Jirstrand M, Bergia R, Campbell WW, Riccardi G, Landberg R. Association of the glucose patterns after a single nonstandardized meal with the habitual diet composition and features of the daily glucose profile in individuals without diabetes. Am J Clin Nutr. 2025 Feb;121(2):246-255. doi: 10.1016/j.ajcnut.2024.11.028. Epub 2024 Nov 28.

Reference Type DERIVED
PMID: 39615596 (View on PubMed)

Hjort A, Bergia RE, Vitale M, Costabile G, Giacco R, Riccardi G, Campbell WW, Landberg R. Low- versus High-Glycemic Index Mediterranean-Style Eating Patterns Improved Some Domains of Health-Related Quality of Life but Not Sleep in Adults at Risk for Type 2 Diabetes: The MEDGICarb Randomized Controlled Trial. J Nutr. 2024 Sep;154(9):2743-2751. doi: 10.1016/j.tjnut.2024.07.005. Epub 2024 Jul 14.

Reference Type DERIVED
PMID: 39004223 (View on PubMed)

Costabile G, Bergia RE, Vitale M, Hjorth T, Campbell W, Landberg R, Riccardi G, Giacco R. Effects on cardiovascular risk factors of a low- vs high-glycemic index Mediterranean diet in high cardiometabolic risk individuals: the MEDGI-Carb study. Eur J Clin Nutr. 2024 May;78(5):384-390. doi: 10.1038/s41430-024-01406-y. Epub 2024 Jan 24.

Reference Type DERIVED
PMID: 38267533 (View on PubMed)

Vitale M, Costabile G, Bergia RE, Hjorth T, Campbell WW, Landberg R, Riccardi G, Giacco R. The effects of Mediterranean diets with low or high glycemic index on plasma glucose and insulin profiles are different in adult men and women: Data from MEDGI-Carb randomized clinical trial. Clin Nutr. 2023 Oct;42(10):2022-2028. doi: 10.1016/j.clnu.2023.08.016. Epub 2023 Aug 25.

Reference Type DERIVED
PMID: 37651979 (View on PubMed)

Bergia RE 3rd, Biskup I, Giacco R, Costabile G, Gray S, Wright A, Vitale M, Campbell WW, Landberg R, Riccardi G. The MEDGICarb-Study: Design of a multi-center randomized controlled trial to determine the differential health-promoting effects of low- and high-glycemic index Mediterranean-style eating patterns. Contemp Clin Trials Commun. 2020 Aug 13;19:100640. doi: 10.1016/j.conctc.2020.100640. eCollection 2020 Sep.

Reference Type DERIVED
PMID: 32885091 (View on PubMed)

Other Identifiers

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16100183

Identifier Type: -

Identifier Source: org_study_id

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