Dietary Intervention With Brain-friendly Diet

Inclusion criteria 1. Signed written informed consent 2. Age 18-65 years 3. Assumed metabolic risk based on pre-screening assessment of glucose and lipid metabolism related metabolites defined initially as being within the most impaired quartile with reference to available metabolite data-base from a comparable population. If recruitment efficiency requires, having a metabolic profile within the most impaired half instead of a quartile may be applied. 4. Male or female with at least 1/3 of the gender defined predominant among screened participants with assumed metabolic risk 5. Adequate Finnish or English skill to comprehend trial related instructions and questionnaires 6. Chest circumference of 75 to 115 cm (limits included) Exclusion criteria 1. High probability to travel for more than one working day a week during the trial 2. Expected or planned major changes in lifestyle (diet, level of exercise, significant changes in work) or involved in the R\&D of the measuring devices applied in the trial 3. Allergies restricting compliance with control or intervention diet (celiac disease, gluten free diet, stringent FODMAP diet) 4. Nickel allergy 5. History of unstable coronary artery disease (myocardial infarction, coronary artery bypass graft (CABG), percutaneous transluminal coronary angioplasty (PTCA), temporal ischemic attack within the previous 6 months 6. Diagnosed type 1 or type 2 diabetes requiring treatment 7. Inflammatory bowel disease or other intestinal or oesophageal disease requiring medical treatment or likely to have a nutritional affect 8. History of malignant diseases like cancer within five years prior to recruitment 9. Lipid lowering medication (statin, cholestyramine) or medication for obesity (orlistat, or liraglutide) or depression 10. Alcohol abuse (\> 4 portion/per day) or recreational drug abuse 11. Pregnancy or planned pregnancy or lactating 12. Suspected low compliance according to the investigator's assessment