Free groceries or gift cards boost weight loss for those struggling with food access

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Provision of signed and dated informed consent form 2. Stated willingness to comply with all study procedures and availability for the duration of the study 3. Age \>18 years 4. BMI \>30 kg/m2 at screening visit 5. Screening positive for food insecurity using a score of \>3 on the 10-item US Adult Food Security Survey Module109 6. Completion of baseline assessments 7. Ability to engage in physical activity (i.e., can walk at least 2 blocks) 8. Willing and able to provide pictures of food receipts to study team (or mail actual receipts) 9. Ability to reliably receive packages at a consistent location in a timely manner 10. Telephone or internet service to communicate with study staff 11. For females of reproductive potential: agreement to use of highly effective contraception for during study participation Exclusion Criteria: 1. Serious medical conditions (e.g., type 1 or type 2 diabetes, renal failure) that may pose a risk to the participant during intervention, cause a change in weight, or limit ability to adhere to the program's behavioral recommendations 2. Significant psychiatric conditions (e.g., active substance abuse, schizophrenia) that may pose a risk to the participant during intervention, cause a change in weight, or limit ability to adhere to the program's behavioral recommendations 3. Breastfeeding, pregnant or planning pregnancy in the next 6 months 4. Planned move from the Philadelphia area in the next 6 months 5. Weight loss of \>5 kg in the previous 90 days 6. Recently began a course of or changed the dosage of medication that can cause significant weight change (±5 kg) 7. Previous or planned obesity treatment with surgery (excluding lap band if removed for \>1 year) or a weight-loss device 8. Use of prescription or over the counter medications for chronic weight management in the past 3 months 9. Household member already participating in study due to potential contamination effects 10. Lack of stable residence and ability to store and prepare food