Cohort Study on Plant-based Diets (COPLANT Study)

Last updated: February 13, 2025
Sponsor: German Federal Institute for Risk Assessment
Overall Status: Active - Recruiting

Phase

N/A

Condition

Obesity

Diabetes Mellitus, Type 2

Diabetes Prevention

Treatment

N/A

Clinical Study ID

NCT06323538
01
  • Ages 18-69
  • All Genders

Study Summary

The Cohort on Plant-based Diets (COPLANT) study is a multi-centre cohort study that starts baseline recruitment from 2024 to 2027 with approximately 6,000 participants in Germany and Austria. The COPLANT study focuses on vegan (no animal products), vegetarian (no meat and fish, but dairy products and eggs), pescetarian (no meat, but fish) and omnivorous (mixed diet including all possible animal products) diets. The aim of the COPLANT study is to gain new insights on health benefits and risks as well as social, ecological and economic effects of different plant-based diets in comparison to a mixed diet. In addition to a detailed dietary survey using an app adapted to the needs of this study, the baseline examination includes measurements of body composition, bone health, cardiovascular risk factors, diabetes risk, contaminants and lifestyle. For the basic laboratory program, fasting blood, 24-hour urine collection and a stool sample are taken from all study participants. Furthermore, specific aspects of dietary behavior, physical activity and other lifestyle factors are collected via questionnaires. Follow-up studies are planned at intervals of 5, 10 and 20 years after the baseline visit.

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • age between 18 and 69 years at recruitment (age-stratified recruitment in four agegroups (18 to 29, 30 to 39, 40 to 49 and 50 to 69 years) which should be equallydistributed across the four diets)

  • following their current diet for at least one year

  • health insured

  • are willing to have blood taken (adults)

  • are willing and able to complete questionnaires

  • only at Berlin, Jena, Giessen and Karlsruhe sites: pregnant and breastfeeding womenwere recruited (shortened examination programm)

  • only at the Regensburg, Heidelberg, Bonn and Vienna sites: are neither pregnant norbreastfeeding at the time of recruitment

  • only at Berlin and Karlsruhe sites: children of adult participants (shortenedexamination programm without collection of blood, urine, and stool)

  • are able to give informed consent to participate in the study

  • have given their consent to participate in the COPLANT study

Exclusion

Exclusion Criteria:

  • who can no longer be contacted

  • who withdraw their consent to participate in the study

Study Design

Total Participants: 6000
Study Start date:
April 09, 2024
Estimated Completion Date:
March 31, 2047

Study Description

The multicenter Cohort on Plant-based diets (COPLANT) study, aims to investigate the health benefits as well as short-term and long-term risks of different plant-based diets (vegan: no animal products, vegetarian: no meat and fish, but dairy products and eggs, pescetarian: no meat, but fish) compared to a mixed diet among 6,000 participants aged 18 to 69 years across German speaking countries. Currently the impact of different diets not only on health effects, but also on social, ecological and economic factors is becoming increasingly evident in areas of social justice, climate change and animal welfare. For this reason, a sustainability analysis (social, ecological and economic effects) together with findings on health effects will be included in the COPLANT study. As plant-based diets, especially vegan diets, are associated with specific risks and benefits for certain population groups such as pregnant women, breastfeeding mothers and children, COPLANT will also establish appropriate research structures for these groups and include them in the study.

The detailed consumption survey of all study participants is one of the main pillars of the planned study. Of particular importance is the dietary assessment of novel vegan and vegetarian foods, thus an app adapted to the needs of this study was developed. The characterisation of external and internal intakes of nutrients and contaminants within a particular diet will be examined. Large epidemiological projects currently underway in Germany, such as the NAKO Health Study, are unable to answer these questions. In order to prospectively investigate links between diet and the later occurrence of common diseases such as type 2 diabetes, cardiovascular diseases and cancer, the study participants should be followed up for at least 20 years if third-party funding is successfully acquired.

The study is to be conducted in study centers at the Federal Institute for Risk Assessment (BfR), Berlin, the Max Rubner-Institut (MRI) in Karlsruhe, the Rheinische Friedrich-Wilhelms University in Bonn, the Friedrich Schiller University Jena, the Research Institute for Plant-Based Nutrition in Giessen, in cooperation with the Justus Liebig University Giessen and at the universities of Heidelberg, Regensburg and Vienna. Furthermore, the basic examination includes measurements of body composition, bone health, cardiovascular risk factors, diabetes risk, contaminants and lifestyle. Specific aspects of dietary behavior, physical activity and other lifestyle factors will be assessed using questionnaires. For the basic laboratory program, fasting blood, 24-hour urine collection and a stool sample are taken from all study participants.

Participants will be recruited for the baseline study from 2024 to 2027. Follow-up visits are planned at intervals of 5, 10 and 20 years.

Connect with a study center

  • University Vienna

    Vienna, 1090
    Austria

    Active - Recruiting

  • Max Rubner-Institut

    Karlsruhe, Baden-Württemberg 76131
    Germany

    Active - Recruiting

  • Friedrich-Schiller University

    Jena, Thuringia 07743
    Germany

    Active - Recruiting

  • The German Federal Institut for Risk Assessment

    Berlin, 10589
    Germany

    Active - Recruiting

  • University Bonn

    Bonn,
    Germany

    Active - Recruiting

  • Research Institute for Plant-Based Nutrition, Gießen

    Gießen, 35444
    Germany

    Site Not Available

  • University Heidelberg

    Heidelberg, 69120
    Germany

    Site Not Available

  • University Regensburg

    Regensburg, 93053
    Germany

    Active - Recruiting

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