Ok, I'm so out of it that my first thought was: real bath salts and plant food? Who ever thought of snuffing bath salt or plant food?
My second thought was: if I thought it was a high end bath product (I would never spend $20 on plant food) and purchased it, would it irritate my skin?
I'm so glad that my kids are too old or too young to worry about this right now. I always went with the "don't be an idiot" advice. If you want to drink or use pot from a VERY reliable source, that is O. thing, but most of these drugs are dangerious at least in part because they are illegal and I don't want you to put something in your body made by an idiot in his bathroom or basement.