Opti Bac Probiotics Bifidobacteria & Fibre is a natural supplement containing selected microorganisms & fibres to help those with constipation. It can be taken once in a day for maintaining healthy bowel movements. Active, powerful ingredients Bifidobacterium lactis BB-12 a high-quality strain, to survive stomach acidity & biliary salts to reach the gut alive. Fructooligosaccharide (FOS), a soluble fibre provides natural, high fibre for easy digestion. It acts as a food source for the body's natural bacteria, & as roughage in the bowels. Safe to use. This is safe & gentle to use supplement for long-term use, & can be taken by infants as young as 1 year. It is also safe for pregnant & breastfeeding mothers, as well as the elderly.