Looking at the various posts, it seems that a whole raft of alternative NDTs and like preparations are being used for therapy. I'd like to know which of these are controlled by the standards set by a Pharmacopeia (that is they are effectively controlled drugs) and which are only classed as food supplements (not under any such strong control as to consistency of contents batch to batch). I think it would be useful to HU to classify the two sorts of NDT so as to be able to give advice on the safety and consistency of a particular product. It's essential for a patient to know exactly what they are taking, and how consistent it is; otherwise they can get into all sorts of trouble. Myself, I would only recommend Pharmacopeia controlled products as we know then what they contain.