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European Journal of Nutrition

, Volume 58, Issue 4, pp 1369–1380 | Cite as

Differences in the interpretation of a modernized Mediterranean diet prescribed in intervention studies for the management of type 2 diabetes: how closely does this align with a traditional Mediterranean diet?

  • Anthony VillaniEmail author
  • Jacinta Sultana
  • Justin Doecke
  • Evangeline Mantzioris
Review

Abstract

Purpose and Methods

Adherence to Mediterranean diet (MedDiet) is associated with the prevention and management of type 2 diabetes mellitus (T2DM). However, in intervention studies, there is discordance in the interpretation of a MedDiet. The purpose of this paper was to examine, synthesize, and develop a narrative review, exploring the qualitative differences in the interpretation of a modernized MedDiet prescribed as an intervention in clinical trials for the management of T2DM, and how closely this aligns with a traditional MedDiet. The ‘traditional’ MedDiet is often described as a dietary pattern high in unprocessed plant foods (fruits, vegetables, legumes, nuts, wholegrain cereals, and olive oil); moderate consumption of wine; low moderate in fish/shellfish; and an infrequent consumption of red meat, animal fats, vegetable oils, and processed foods.

Results and Conclusions

Synthesis of the reviewed literature demonstrates considerable variation in the qualitative interpretation of a MedDiet. We also identified inadequate reporting of MedDiet interventions, despite a number of studies referring to their intervention as a ‘traditional’ MedDiet. The majority of studies emphasized the same key dietary components and principles: an increased intake of vegetables, wholegrains, and the preferential consumption of white meat in substitute of red and processed meat and abundant use of olive oil. However, the reporting of specific dietary recommendations for fruit, legumes, nuts, bread, red wine, and fermentable dairy products were less consistent or not reported. Irrespective of the discordance in the interpretation of a MedDiet, a number of studies included in the present review reported improved glycaemic control and favorable cardiovascular outcomes with adherence to a Mediterranean-style diet. Nevertheless, greater clarity and depth of reporting amongst intervention studies is warranted for the refinement of a modernized MedDiet definition that is distinct from a prudent dietary pattern.

Keywords

Mediterranean diet Dietary pattern Definition Dietary intervention Type 2 diabetes Randomized control trials 

Notes

Author contributions

All the authors contributed to this work. AV and EM contributed to data extraction, interpretation of the findings, and preparation of the final manuscript. JS and JD conducted the literature search, completed data extraction, assisted with the interpretation of the findings, and contributed to the final manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Anthony Villani
    • 1
    Email author
  • Jacinta Sultana
    • 1
  • Justin Doecke
    • 2
  • Evangeline Mantzioris
    • 2
  1. 1.School of Health and Sport SciencesUniversity of the Sunshine CoastMaroochydoreAustralia
  2. 2.School of Pharmacy and Medical ScienceUniversity of South AustraliaAdelaideAustralia

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