The mescaline can be extracted but not easily. Eating it or making tea from it is standard. It tastes bitter and you have eat a lot. Once you get it down and start tripping wow! The euphoria, the colors (it's a woderful psychadelic), smoothe long lasting journey. Sacred experience. Lots of info on the net. Yes it is legal to grow and possess. Easy to gro from cuttings. Read up on it. I have cuttings and rooted plants for those interested in it for ornamental purposes.