So basically now, short of law reform (unlikely), the only way to have our humble herbs re-introduced to the sphere of legality is if some major company foots the bill to 'research its harm/benefit payoff'. I can see where this is heading...
"Ah yes, calea zacatechichi. Well, we've done the research after being alerted to its potential therapeutic uses and we came back with mixed results. It appears that the active ingredient is indeed safe for normal consumption, HOWEVER it is important to note that further testing must be done in order to confrim these results with the original plant matter. For now, we have isolated and improved upon the active ingredient and are pleased to introduce a new range of medicine under the name of "Greedyguts PharmaCO" which can be found at your local chemist. Those seeking the benefits associated with this herb would do well to seek this clinically proven treatment."