Actively Recruiting
Switching to a Healthy and Sustainable Diet for Planetary and Human Health
Led by Chalmers University of Technology · Updated on 2025-05-15
300
Participants Needed
1
Research Sites
N/A
Total Duration
On this page
Sponsors
C
Chalmers University of Technology
Lead Sponsor
G
Göteborg University
Collaborating Sponsor
AI-Summary
What this Trial Is About
Researchers are evaluating the effectiveness of an optimized lifestyle intervention that combines dietary advice, behavioral support, and provision of key foods compared to dietary advice with behavioral support or dietary advice alone. The goal is to improve nutritional status, metabolic risk factors, and contribute to planetary sustainability. This study involves 300 adult participants from diverse socioeconomic areas in Gothenburg, Sweden, and aims to provide insights into sustainable and health-promoting dietary patterns in Nordic conditions. The study randomly assigns participants into three groups of 100 each for a twelve-week intervention: one group receives dietary advice, behavioral support, and key foods; the second group receives dietary advice with behavioral support; and the control group receives dietary advice based on the SWITCH diet alone. The SWITCH diet emphasizes whole grains, vegetables, fruits, legumes, and sustainable seafood while limiting processed foods, added sugars, and salt. Behavioral support includes personalized coaching sessions, educational materials, and practical tools. Food support provides key ingredients like whole grains, vegetables, fruits, legumes, and seafood to the optimized intervention group to facilitate adherence. Participants will undergo clinical assessments at baseline, week 7, and week 13, including measurements of body data, blood pressure, blood glucose, blood lipids, and inflammatory markers. Dietary intake and sustainability factors will also be monitored. Researchers will measure changes in cardiometabolic risk factors such as cholesterol levels, blood pressure, glucose, and insulin resistance. Secondary outcomes include diet changes, nutritional and inflammatory markers, and planetary sustainability measures. The study will also explore links between diet, lifestyle changes, gut microbiota, and metabolic responses.
CONDITIONS
Brief Title
The SWITCH Dietary and Behavioural Intervention Study
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Age 18 to 70 years
- Body mass index 25 to 35 kg/m2
- Stable dietary patterns with no specific dieting in the last 4 weeks
- Willingness to follow the advised diet and consume provided key foods
- Stable medications for relevant conditions for at least 14 days
- Access to a freezer at -18°C to store key foods
- Signed informed consent form
You will not qualify if you...
- Having an infection or other relevant illness currently
- Cardiovascular events like heart attack or stroke in the last 6 months
- Diagnosis of any type of diabetes
- Blood pressure equal to or above 185/105 mmHg
- Serum cholesterol equal to or above 8 mmol/L
- Fasting blood glucose above 7 mmol/L
- Use of GLP-1 receptor agonist medications
- History of stomach or gastrointestinal diseases or major gastrointestinal surgery
- Severe and recent irritable bowel syndrome
- Renal or liver failure based on specific lab values
- Anemia with hemoglobin less than 100 g/L
- Blood donation or participation in blood sampling studies within 30 days
- Currently following a specific diet incompatible with the study
- Food allergies or intolerances to study foods
- High regular physical activity level at baseline
- History of drug or alcohol abuse
- Inability to understand written or spoken Swedish
- Pregnancy, breastfeeding, or planning pregnancy during the study
- Participation in another interfering research study
- Other reasons judged unsuitable by the investigators
AI-Screening
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Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - 12 weeks
Participants receive behavioral support through weekly or bi-weekly coaching sessions, either online or in person, to help them adhere to dietary recommendations. The coaching includes personalized guidance, goal setting, self-monitoring, feedback, problem-solving, and practical tools such as visual aids and meal planning resources to encourage sustainable dietary habits.
Weekly or bi-weekly coaching sessions
Duration - 12 weeks
Participants in the optimized lifestyle intervention group receive key foods such as whole grains, vegetables, fruits, legumes, and seafood, along with recipes and meal plans to support adherence to the SWITCH diet. Some fresh foods are made available at nearby supermarkets for convenience.
Food provided throughout intervention period
Duration - 12 weeks
Participants receive a simple written document outlining the SWITCH diet, including guidelines to increase intake of whole grains, vegetables, fruits, legumes, and seafood while limiting processed foods, added sugars, and salt, without additional counseling or support.
1 baseline visit (in-person)
Trial Site Locations
Total: 1 location
1
Center for Lifestyle Interventions, Sahlgrenska University Hospital, Östra
Gothenburg, Sweden
Actively Recruiting
Research Team
R
Rikard Landberg, Professor
M
Malin Barman, Docent
How is the study designed?
Study Type
INTERVENTIONAL
Masking
SINGLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
PREVENTION
Number of Arms
3
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