It doesn't help valves , it would either stick them or cause slow valve action . It is a glue that we used in elementary school , like the first grade. I believe it is made from dead horse tissue. Some first graders would sometimes eat the glue or flour type type paste that we all used. The glue is a natural compound and not poison. It would probably constipate if very much was eaten. Its been a long time ago, unlike some of the other children, I guess that I was too finiky to eat any of it..... You asked!!