All I know is it blocked me up solid. Even 12 of the digestive aid that goes with it did not budge it. Im STILL trying to get it all out. Im using Oxypowder . Seems to be working. When I got my rope out I used a long skewer (the wooden throw away kind) and poked at it and picked it up and it was SOLID man.It was exactly like thick rubber I dont believe the shakes could have gotten that solid. Mine were not black tho they were dark brown.