Inclusion Criteria:  Aged 18-75 Current BMI ≥ 25 kg/m2 Reporting a desire to lose weight Have at-home internet access Proficiency in speaking, reading, and writing English Willing to consume a whole foods plant-based diet for the study duration  Exclusion Criteria:  Use of medications for weight loss Recent weight loss (≥5% weight loss in prior 3-months) Current or planned pregnancy within the study period History of bariatric surgery Currently following a low-fat plant-based diet Diagnosis of a serious medical condition influencing weight, appetite, or eating behavior Diagnosis of a serious psychiatric condition that may influence weight, appetite, or eating behavior Current substance use disorder Participation in a concurrent weight loss program Planning on quitting smoking over the intervention period (if current smoker) Eating pathology (lifetime history of an eating disorder, ≥ 9 binge eating episodes in the past 3 months, or > 5 compensatory episodes in the past 3 months)