OptiBac Probiotics One Week Flat is a seven-day good bacteria supplement course. One Week Flat has unique probiotic strains and prebiotics that helps maintain a healthy balance of friendly bacteria in the intestines to support digestive health, aid transit and promote a comfortably flat stomach. Opti Bac Probiotics One Week Flat is a unique blend of 4 strains of live cultures, which have different properties, and are all scientifically proven to survive the stomach acidity and bile salts to reach the gut alive. Having an imbalance of good and bad bacteria in the gut may be associated with various digestive health conditions such as bloating. It contains high quality, researched strains such as Lactobacillus casei Rosell-215, and is advised to be taken consecutively for seven days. The natural bacteria in this product is combined with Fructooligosaccharides fibres (FOS 0. 3g).No refrigeration required. Suitable for women during pregnancy, children (4 years+) Vegetarian, Gluten Free. 28 Sachets