ADAPT Study: Assessing Diet, Appetite and Physiology Throughout Weight Loss Study)

Inclusion Criteria:

* BMI 30.0 - 50.0 kg/m2
* Able to attend study intervention classes and study visits/assessments
* Independently living with access to food preparation facilities

Exclusion Criteria:

* Current smoker or regular use of nicotine containing products and/or cannabis
* Heavy alcohol use (≥2 drinks/d for females, ≥3 drinks/d for males) or drug use
* Known cognitive impairments or h/o stroke
* Type 2 diabetes (known diagnosis or by screening A1c (≥6.5%))
* Medical conditions (chronic diseases, cancer, MS) or labs limiting ability to participate
* Females: currently pregnant (or 6-months postpartum of full-term pregnancy) and/or current breastfeeding
* Use of medications with significant effects on appetite (e.g., weight loss medications, atypical antipsychotics, stimulants) and/or chronic use of anticoagulants
* History of bariatric surgery
* History of eating disorder
* Current participation in a formal weight loss program
* Prior or current participation in a research study involving weight loss
* Weight-reduced by \>10% within past year
* Weight \> 330 pounds (MRI limit)
* Allergy or intolerance to or unwillingness to consume study foods provided at visit
* MRI contraindication (e.g., implanted metal, claustrophobia)
* Do not have a phone compatible with activity tracker or access to videoconferencing platform that will be used for the dietary intervention or other appropriate technology needed to complete study procedures
* Any condition(s) found by the study team and confirmed with the PI(s) that make it unsafe to participate