HappyBelly, a probiotic complex by SynBalance, is designed to support children’s gastrointestinal health. A randomized, double-blind, placebo-controlled trial on IBS-C subjects showed significant symptom improvement after only 10 days. Results confirmed the strains’ ability to colonize the gut, therefore restoring a balanced microbiota, while inhibiting gastrointestinal pathogens growth and reducing IBS-C symptoms.