A Herbal Combination of Rhubarb Root and Fennel Seed Extract Alleviates Functional Constipation and Modulates Gut Microbiota in Adults: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial. JCNFS [Internet]. 2024 Oct. 17 [cited 2026 Oct. 31];7(1):40-7. Available from: https://somatopub.com/index.php/JCNFS/article/view/466