Inclusion criteria:
Willingness to cooperate and sign the informed consent form after full knowledge of the objectives and methods of the study.
Girls and boys aged 8 to 18 years.
Diagnosis of IBD based on endoscopic, laboratory studies, and clinical examinations.
Absences other diseases and chronic and acute liver disorders (hepatitis B, C, etc.), biliary disease, other gastrointestinal diseases, chronic diseases (including type one or two diabetes, cardiovascular, pulmonary and celiac disease), autoimmune diseases Known and inherited and metabolic disorders.
No history of alcohol consumption or alcohol consumption more than 10 grams per day in women and more than 20 grams per day in men.
No pregnancy or breastfeeding in women.
No substance abuse, no chronic inflammatory disease, no history of cancer, no hormone therapy, no recent weight loss diet.
No history of gastrointestinal surgery.
Do not take medications or supplements that affect appetite, weight, or metabolism for at least 6 months before the study (such as medications that affect carbohydrate, protein, or fat metabolism, and medications that reduce or increase appetite or food intake, including herbal supplements).
Exclusion criteria:
Having any acute illness
The occurrence of any accident that affects a person's health.
Use of antibiotics during the study
Acceptance rate less than 80%
Immigration
Exclusion based on personal preference of participants or their parents
Changes in medications taken during the study period