Optibac One Week Flat is an affordable, 7-day course of friendly bacteria in easy-to-take sachets. It's gluten-free and therefore may be suitable for those with bloating.

Ingredients

Maltodextrin (natural source); Fructooligosaccharides (FOS 0.3g); Live cultures: Bifidobacterium bifidum Rosell-71, Lactobacillus casei Rosell-215, Lactococcus lactis Rosell-1058 and Lactobacillus acidophilus/helveticus Rosell-52

Each sachet guarantees 5 billion live cultures 0.3g FOS fibres.