Skeptical of facebook marketed product, but i need a jug of this, maybe even a water cooler size...i want to get it to all of the neighborhood dogs we all grow old together with....it works, and i think it works better than dausiquin, as it may be easier on their digestive system...bravo, what's next!? NAD+; Creatine...pretty happy about the efficacy, just seems to be running out of bottles too soon...