Land race is the local seed. In America there is not much outdoor bud growing, so the only "Landrace" they can get is from other places, in a baggie.
What do you want me to say? It makes your nose itch like crazy even just taking some one time, so I bet people that take it all the time start to enjoy indicators like an itchy nose instead of feeling discomfort. So I can promise that it is probably pretty bad if you do it a lot. But I can't be for sure, because I don't hang out with anyone that sticks themselves with needles all the time or anything. And I know that there is a big problem with people shooting this stuff up.