Fasting-mimicking Diet in Treatment of Depressive Symptoms in IBD

Inclusion Criteria: * Age ≥ 18 and ≤ 65 years at the time of screening * Diagnosis of Crohn's disease in clinical remission or with mild-moderate disease with Harvey Bradshaw Index (HBI\<8) or diagnosis of ulcerative colitis in clinical remission with partial Mayo (pMayo\<7) * Suffering from mild-moderate depression with PHQ-9 ≥5 and ≤ 19 Exclusion Criteria: * Subjects who are reliant on partial or total parenteral nutrition * Subjects with prior gastrointestinal surgery and consequences such as short bowel syndrome, ostomy of small or large intestine, total colectomy, proctocolectomy, or ileoanal pouch * Subjects with diabetes or celiac disease * Subjects with a body mass index (BMI) lower than 18 * Subjects suffering from malnutrition or at high risk of malnutrition assessed by a score of ≥6 on the abridged patient generated subjective global assessment (PGSGA) * Subjects allergic to nuts * Subjects currently on a fasting/intermittent type caloric restricted diet * History of psychotic or bipolar disorders or experiencing suicidal thoughts * Pregnant women, women who are breast feeding, or women planning on becoming pregnant * Subjects with immune-compromised condition other than inflammatory bowel disease (e.g. AIDS, lymphoma) * Subjects with severe uncontrolled cardiovascular or respiratory disease or active malignancy * Unable to read English or provide informed consent