Combination of Diet and Oral Budesonide for Ulcerative Colitis

Who May Qualify: - willing to sign a consent form - Established diagnosis of UC with mild to moderate active disease, 5 ≤ SCCAI ≤ 10 - Age: 17-65 years (inclusive) - Extent E1-E3 by the Montreal classification - Active colitis in the rectum or sigmoid colon on sigmoidoscopy - Stable medication use of oral 5ASA for at least 8 weeks, thiopurines, vedolizumabs, Ustekinumab or tofacitinib for at least 12 weeks Who Should NOT Join This Trial: - Severe colitis (SCCAI\>10) hospitalization for acute severe colitis (ASC) in the previous 6 months - Use of steroids in the previous 3 months - Patients treated with Anti-TNF currently or in patients who had previously failed or lost response to anti TNF - Vegans (vegetarians may enroll) - Pregnancy - Inability use of budesonide due to severe adverse events - Extraintestinal manifestations such as arthritis, spondyloarthropathy or uveitis - Presence of baseline hypoalbuminemia - Fever \>38°C - Evidence for Clostridioides difficile infection - Renal failure - Hepatitis or PSC (Primary Sclerosing Cholangitis) - Active malignancy (excluding skin BCC). Always talk to your doctor about whether this trial is right for you.