Nutritional Intervention for Endometriosis

Inclusion Criteria: 1. Women with a surgical, imaging, or clinical diagnosis of endometriosis 2. Age 18-45 years 3. Stable health condition and medications for past 3 months 4. Modified Biberoglu and Behrman (B\&B) pelvic pain score of at least 5/9 5. Able to follow a plant-based diet for 12 weeks 6. Willing to be randomly assigned to either a plant-based group or a control group that will not make any dietary changes for 12 weeks Exclusion Criteria: 1. Body mass index ≥ 40 kg/m2 2. Smoking or drug abuse during the past six months 3. Alcohol consumption of more than 2 drinks per day or the equivalent, episodic increased drinking (e.g., more than 2 drinks per day on weekends), or a history of alcohol abuse or dependency followed by any current use 4. Unstable medical or psychiatric illness 5. Already following a plant-based diet 6. Pregnant or breastfeeding, or plans of pregnancy within the study period 7. Hysterectomy or ovariectomy 8. Fibroids, ovarian cysts, pelvic inflammatory disease 9. Endocrine inflammatory conditions, such as Cushing's syndrome, Hashimoto's thyroiditis, Graves' disease, type 1 diabetes mellitus, and Addison's disease 10. Lack of English fluency 11. Unable or unwilling to participate in all components of the study 12. Evidence of an eating disorder