Household introduction of new healthy and sustainable plant-based foods to assess diet incorporation and food acceptance among Portuguese and Swiss consumers

A 4-week home-based intervention to assess diet incorporation and food acceptance of new minimally-processed, fibre-rich, and fermented plant-based foods among healthy adults from Portugal and Switzerland

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN67949258

Enrollment

160

Registered

2026-03-25

Start date

2025-11-01

Completion date

Unknown

Last updated

2026-04-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Low consumption of minimally-processed, fibre-rich and fermented plant-based foods associated with unhealthy and unsustainable dietary patterns frequently observed in Western populations. Other

Interventions

A 10-week single-arm home-based intervention trial will be conducted in Portugal and Switzerland. A study information session will be held at each country’s participating centres for all interested co

and (2) Börs, a traditional Romanian fermented beverage made from wheat bran. The other two are products of similar typology that have already become popular across Europe: (1) Hummus, a traditionally

and (2) Kombucha, a fermented tea beverage originally from East Asia. The latter will be used as a comparison point to identify the drivers of their success in the European market. Every week, partici

Eligibility

Sex/Gender

All

Age

20 Years to 60 Years

Inclusion criteria

Inclusion criteria: DEMOGRAPHICS 1. Age: 20-60 years 2. Household composition: couples (i.e., two adults in a conjugal relationship and living together) DIET 3. Dietary pattern: includes meat and other animal-based foods (i.e., omnivorous or flexitarian) 4. Familiarity: having consumed kombucha and hummus before ABILITIES, RESOURCES AND COMMITMENT 5. Independent users of each country’s official languages 6. Independent internet users 7. Owners of an electronic device compatible with the requirements for home-based data collection 8. Have sufficient time, skills and resources to adhere to the study protocol, namely to complete all self-assessments, to pick up all provisions as scheduled and to safely store the food products 9. Willingness to consume unfamiliar plant-based foods 10. No simultaneous participation in another trial during the study period 11. No planned absences from home (= 3 consecutive days) during the study period 12. Informed consent to participate

Exclusion criteria

Exclusion criteria: 1. Self-reported diagnosis of acute or chronic diseases requiring continuous medical treatment or dietary therapy 2. Food allergies or intolerances to the study food products and their ingredients 3. Pregnancy or intention to conceive during the study period 4. Residence in Portugal/Switzerland for less than 10 years 5. Failure to meet the predefined data quality criteria (e.g., incomplete or inconsistent responses, errors in data quality checks)

Countries

Portugal, Switzerland

Contacts

Public ContactSofia Sousa

sofia.sousa@fc.up.pt+351-968823143

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Apr 17, 2026