Eating to Adjust the Timing System

The goal of this clinical trial is to test the effects of dietary composition on the rhythms of food intake, appetite regulation, and rhythms of energy expenditure. Participants will: complete 2 field-based dietary interventions be provided with standard meals record daily food intake in a real-time manner complete 2 inpatient stays be provided with standard meals have frequent blood draws provide urine, saliva, and stool samples

Inclusion Criteria: * 18-45 yr old * BMI 18.5-29.9 * No acute, chronic or debilitating medical conditions (e.g. metabolic, cardiovascular, respiratory, neurological, cancers, etc.) * Without medication use (except oral contraceptives) Exclusion Criteria: * Currently smoking/vaping or 5 or more years of smoking/vaping * History of drug or alcohol dependency * History of psychiatric illness or disorder * People with food allergies/intolerances or following specific diets