Umami taste tested as a tool to curb overeating

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Healthy: as judged by the participant; * Age 16-65 years at the time of inclusion, assessed by date of birth; * Proper understanding of the Dutch language, as questionnaires will be in Dutch; * Able to visit Wageningen University, as required for dietary intervention and testing; * Body mass index 20-30 kg/m2; * Having normal taste ability, assessed using Mueller taste strip test, ≥12 out of 20 assessed correctly. Exclusion Criteria: * Suffering from endocrine- or gastro-intestinal diseases or other diseases that might influence study outcomes (such as diabetes, Crohn's disease, cardiovascular disease, hypertension, etc.); * Diagnosed with eating disorders (currently or in the past); * Diagnosed with taste or smell disorders in the past six months; * Pregnant or lactating during the study intervention; * Following a strict dietary regime; * Extreme physical activity (\>10 hours per week moderate/high intensity exercise); * Gain or loss of more than 5 kgs in the last six months prior to study entry; * Suffering from lack of appetite for any reason; * Use of medication that may influence the appetite (medication will be judged by the medical investigator); * Having a food allergy and/or intolerance for foods used in the dietary intervention (e.g. lactose intolerance, gluten intolerance, MSG sensitivity). This will be assessed with an open question; * Consumes more than 14 (women) or 21 (men) glasses of alcohol per week; * Consumes MSG-rich sauces (soy sauce, ketjap and/or curry paste) more than once per day, or consumes more than 3 savoury food items (paprika chips, instant noodles, sundried tomatoes and/or pre-packaged seasonings) per day. This will be assessed with a frequency of consumption table; * Irregular eating pattern. This will be measured with a frequency of meal/food consumption table, and is defined as: frequency of breakfast consumption less than once per week; * Unwilling to maintain regular exercise pattern during the study period. This will be assessed with a yes/no question; * Unwilling to quit use of soft or hard drugs during the intervention; * Student or personnel of the division of Human Nutrition and Health, Wageningen University; * Participating in any other intervention study/studies or planning to participate in another intervention study during the study period.