Liquid Longevity™ contains a blend of 10 probiotics, each strain selected specifically to help support healthy digestion in dogs. The probiotics are viable throughout the shelf life. Through our special process, Liquid Longevity™ is formulated and guaranteed to a maximum pH of 3.5. Most probiotics don’t even tell you their pH level, we guarantee it. Liquid Longevity™ probiotics are geared to survive in a low pH environment. See the Liquid Longevity™ difference for yourself. We think you will find that you’ve never fed anything to your dog that was so healthy and tasted so good.