Lamberts Acidophilus Extra 10 are among the most potent Acidophilus supplements available in the UK: containing over 10 billion live bacteria per capsule, it is a probiotic mainly used for preventing the pathogenic bacteria in your gut overcoming the friendly bacteria but also for restoring balance in the event of this occurence. Primarily advised for those who are travelling overseas, stressed, ill, those who suffer from Candida Overgrowth (thrush) and those who suffer from Irritable Bowel Syndrome (IBS). This product is best contained in cool, dry conditions in order to preserve and prolong the lifespan of the Acidophilus bacteria. One pack of 30 is equivalent to a 30 day supply as the recommended daily intake is one capsule for optimal effectiveness. A pack of 60 Lamberts Acidophilus Extra 10 is equivalent to a 60 day supply as one capsule per day is advised for optimal effectiveness.