Dietary UCDecentralized Dietary UC Pilot Trial

Inclusion Criteria:

1. Males and females between the ages of 18 and 80, inclusive, who reside in the state of Massachusetts.
2. Ability and willingness to provide documented informed consent and to comply with the study procedures, including in-person visits for Arm 1 and video visits for Arm 2.
3. Documented history of moderate to severe active UC
4. Disease duration of ≥12 weeks at the time of screening (diagnosed according to American College of Gastroenterology practice guidelines)
5. Screening fecal calprotectin>350 mg/g
6. Diagnosis of moderately to severely active UC, including historical endoscopy sub score ≥2; a rectal bleeding sub score ≥1 and disease activity a minimum of 25 cm from the anal verge.
7. Documented (via video or report) endoscopy performed within 2 years prior to randomization.
8. Access to a computer or mobile device with internet connection and an active email address.

Exclusion Criteria:

1. Prior extensive colonic resection, subtotal or total colectomy or planned surgery for UC
2. Past or present ileostomy or colostomy
3. Short bowel syndrome
4. Diagnosis of indeterminate colitis, fulminant colitis, toxic megacolon
5. Past or present fistula or abdominal abscess
6. History or current evidence of colonic mucosal dysplasia
7. Use of tube feeding, defined formula diets or parenteral alimentation/nutrition which has not been discontinued ≥3 weeks prior to study enrollment
8. Use of anticoagulants, herbal supplements and omega-3/fish oil supplements during the study
9. Crohn's Disease
10. Significant uncontrolled co-morbidity, such as neurological, cardiac (e.g., moderate to severe heart failure NYHA class III/IV), pulmonary, renal, hepatic, endocrine or gastrointestinal disorders
11. History of alcohol, drug or chemical abuse within 6 months prior to screening
12. Pregnant females, those intending to become pregnant, and those who are lactating
13. Current participation in any other clinical trial