okay I have tried both the leaves and the extract. Extract is always better, but the leaves can work though. To smoke the leaves, use a pipe because pipes make the smoke hot, creating more chemicals the hotter it gets, giving you more effect. Trust me, I learned this in chemistry lol. Anyway, just remember to smoke from a pipe, NOT a bong or joint..they dont work. The water in the bong will cool the smoke down. Also, if u have one, use a torch lighter...they get it hotter. ALSO, u must inhale salvia very deep in your lungs, then hold for a couple seconds..then release. Thats about it.