The Influence of a Fasting Mimicking Diet on 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.