PortionSize Study 2 Free-Living Evaluation

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