Ultra-high strength for short-term use alongside and/or following antibiotics and during periods of digestive upset. 50 billion multi-strain research-backed ProVen Probiotics per capsule. 14 capsules per pack ? to take alongside and following a course of antibiotics. Supported by a large number of clinical trials, the first undertaken in 2004. Proven to survive stomach and bile acids. One capsule a day at least two hours away from each dose of antibiotics