The goal of this clinical trial is to learn if the Grape Seed Extract Ecovitis, featuring low monomeric catechins content and a high concentration of oligo-polymeric procyanidins, could modulate the Gut Microbiota composition of Ulcerative Colitis patients during the remission phase. The main questions it aims to answer are: Does Ecovitis improve the microbiota composition in patients with Ulcerative colitis? Is the intestinal permeability affected? What about the variation in the quality of life? Participants will: Take 2 capsules/day of Ecovitis for eight weeks Visit the clinic two times for checkups, serum collection, and Questionaire.