Fasting Mimicking Diet for Mild to Moderate Ulcerative Colitis

Inclusion Criteria: * Mild to moderate Ulcerative Colitis on the partial Mayo Score out of 9 (score between 2 to 7) * Age of 18-70 at start of study (inclusive) Exclusion Criteria: * Women who are pregnant or nursing or expect to be pregnant * Individuals allergic to nuts * Individuals with a body mass index (BMI) lower than 18 * Individuals diagnosed with a serious medical condition as defined by the patient's physician, unless approved in writing by a physician * Individuals who have been severely weakened by a disease or medical procedure, * Individuals who are taking medication which may not be safely consumed with a calorie restricted diet * Individuals with diabetes who are taking anti-diabetic drugs associated with risk of hypoglycemia * Individuals with more than mild-moderate cardiovascular disease or life-threatening cancer (as determined by patient's physician) unless approved by a physician * Individuals with history of severe cardiac disease (particularly uncompensated congestive heart failure NYHA grade 2 or more or LVEF \< 40%) * Individuals with a history of syncope * Individuals with dietary needs incompatible with the FMD meal plan * Individuals with liver or kidney disorders that may be affected by very low glucose and protein content of the diet. * Patients on a caloric restricted diet will also be excluded. * Patients with relevant prior gastrointestinal surgery and consequences such as short bowel syndrome, ostomy of small or large intestine, hemi- or total colectomy, proctocolectomy, ileoanal pouch will be excluded.