IRCT20170730035381N1 IRCT 2017-12-28 Vice Chancellor for Research and Technology of Ahvaz Jundishapur University of Medical Sciences Comparison of Extra Virgin Olive Oil and Canola Oil in Treatment of Patients with Ulcerative Colitis(UC) Comparison of Extra Virgin Olive Oil and Canola Oil on Clinical Outcomes and Inflammatory Markers (hsCRP, TNF-α) among Patients with Ulcerative Colitis(UC) 2018-01-21 anticipated 32 Complete https://irct.ir/trial/26750 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Crossover, Purpose: Treatment, Randomization description: Randomization in this study will be done by block method, which means that the researcher divides individuals into subgroups called blocks. The randomization unit in this study is a block and the number of people in each block is similar and four. Assignment of patients to each groups of the treatment will be done by using these blocks. In this method, SAS algorithm software is used to make random sequences and determine the type of treatment assigned to each patient. Concealment will also be done by placing the type of treatment assigned to each person in the envelope, so that the person providing the treatment is unaware, Blinding description: The type of blindness in our study will be single-blind, so that the person who evaluate the outcomes of the study (data analyzer), does not know the type of treatment assigned to each patient. The type of treatment and its order is characterized by coding. In this study, due to the nature of complementary treatment (Extra Virgin Olive oil and Canola Oil), there is no possibility for blinding participant, clinician and researcher. 2-3 Ulcerative colitis. Intervention 1: Extra virgin olive oil; 50 ml once daily; Crossover intervention for 20 days and 14 days wash out; with food in raw form (no frying and cooking oil); Aryan Tame Khazar Co. Intervention 2: Intervention group: Canola oil; 50 ml once daily; Crossover intervention for 20 days and 14 days wash out; with food in raw form (no frying and cooking oil); Aryan Tame Khazar Co. Undecided - It is not yet known if there will be a plan to make this available