Co-supplementation With Bifidobacterium Longum W11 and Colopectin for Maintenance Therapy in Children With Functional Constipation

Functional constipation is one of the most common gastrointestinal disorders in childhood and is frequently associated with painful or infrequent defecation, stool retention, and reduced quality of life. In many children, maintenance treatment with macrogol is required for prolonged periods, and gradual weaning may be clinically challenging. Therefore, supportive dietary or microbiota-targeted strategies that may facilitate maintenance management and discontinuation of macrogol are of clinical interest. Bifidobacterium longum W11 is a probiotic strain with potential effects on intestinal function and motility, while Colopectin contains prebiotic and fiber-related components that may help support bowel regularity. The combination is being investigated as a co-supplementation strategy in children with functional constipation during the maintenance phase of treatment. This study is a randomized, double-blind, placebo-controlled, parallel-group trial in children aged 2 to 6 years with functional constipation who have been receiving maintenance-dose macrogol for at least 3 months and are candidates for treatment weaning. A total of 100 participants will be randomized in a 1:1 ratio to receive either Bifidobacterium longum W11 (Bowell®) plus Colopectin (Colopectin®) or placebo, administered once daily between meals in the afternoon for 4 weeks. After the treatment period, supplementation will be discontinued and participants will be monitored for an additional 4 weeks. Clinical assessments will be performed at baseline (T0), at Week 4 (T1), and at Week 8 (T2). The primary endpoint is persistence of constipation, defined as 2 or fewer bowel movements per week, after discontinuation of macrogol therapy. Secondary endpoints include changes in stool consistency assessed using the Bristol Stool Scale, presence or absence of distress during evacuation, number of soiling episodes, and treatment compliance.