Efficacy and tolerance of lactitol supplementation for adult constipation: a systematic review and meta-analysis

PubMed: 25050074

Dose-response effect of Bifidobacterium lactis HN019 on whole gut transit time and functional gastrointestinal symptoms in adults

PubMed: PMC3171707

Probiotics reduce symptoms of antibiotic use in a clinical setting: a dose response study

PubMed: 24291194