Health Effects of Ultra-processed Food Intake

Inclusion Criteria: * Age 20-60 years * Weight stable (less than 5% weight change in the past 3 months) * No plans to change weight * Willing to eat the study diet and a mixed diet * Habitually eats breakfast, lunch and dinner * Has provided informed consent to participate in the study Exclusion Criteria: * Allergy or intolerance to foods included in the study. Participants with lactose intolerance treated with lactase may participate if they take enzymes. * BMI \<18.5 or \>35 kg/m² * \>8h/week of intense physical activity * Use of medications known to significantly affect appetite (e.g., oral corticosteroids, antipsychotic medications, or GLP-1 receptor agonists) * Use of lipid-lowering medications (e.g., statins or PCSK9 inhibitors) * Diagnosed diabetes or capillary blood glucose at or above 12.2 mmol/L * Disease associated with malabsorption (e.g., inflammatory bowel disease or celiac disease) * Previous bariatric surgery * Established cardiovascular disease (heart failure, myocardial infarction, or stroke) or cancer * Pregnancy or breastfeeding, or plans to become pregnant or breastfeed during the study * Deemed likely to have poor adherence