Dietary modifications, combining increased intake of anti-inflammatory foods and decreased intake of pro-inflammatory foods, effectively impede subclinical inflammation in ulcerative colitis patients in clinical remission.
The study conducted a 6-month open-label, randomized, placebo-controlled trial on adult patients with ulcerative colitis who were in clinical remission. The patients were randomly assigned to follow either an Anti-inflammatory Diet (AID) or Canada’s Food Guide (CFG). The AID was designed to raise the consumption of dietary fiber, probiotics, antioxidants, and omega-3 fatty acids, while reducing the intake of red meat, processed meat, and added sugars. Stool, urine, and serum samples were collected for fecal calprotectin and microbial analysis as well as metabolomic analysis at both the study's start and endpoint.
A total of 53 patients were randomized in the study. The evaluation of the patients’ response to the intervention showed a higher subclinical response in the AID group. Patients in the AID group were found to have a higher intake of specific nutrients and foods such as zinc, phosphorus, selenium, yogurt, and seafood compared to the control group. The AID adherence was related to significant changes in the metabolome, with a decrease in fecal acetone and xanthine levels and an increase in fecal taurine and urinary carnosine and p-hydroxybenzoic acid levels. The AID subjects also exhibited increases in specific fecal bacterial families. In conclusion, dietary modifications involving the increased intake of anti-inflammatory foods combined with a decreased intake of pro-inflammatory foods were associated with metabolic and microbial changes and were effective in preventing subclinical inflammation in these patients.
