Inclusion Criteria:  Male or female, age 18-62 years  Body mass index (BMI) 18.5-50 kg/m2 Subjects who are capable of giving informed consent and complying with all study procedures/requirements. Ownership of an iPhone model 6s or later, which the participant is willing to use for the study Access to Apple ID, password, and email address and willing to use them during the study Willing to use data and any accompanying charges as part of study participation Willing to complete all study procedures and adhere to study visit timelines Willing to be re-contacted for future research and/or follow-up  Exclusion Criteria:  Active cancer diagnosis (excluding some melanomas) Have been 6-month weight unstable (gain/loss >10 lbs in last 6 months) Undergoing weight loss treatment PBRC employee, as previous reviewers argued that they are not representative of the community Women who are currently pregnant or breastfeeding (self-reported) Diagnosed with an uncontrolled thyroid disorder (controlled = 3 months of medication) Have had or plan to have weight loss surgery (gastric band removal may be allowed at PI discretion) Allergic to or unwilling to eat study foods provided (exceptions made at the discretion of the PI) Consume >28 alcoholic beverages per week Anyone severely immunocompromised Any condition or circumstance that in the judgement of the PI could interfere with study participation