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.