Well I know that the specific fertilizers used in it are suspected to account for some of the cancer that ends up in tobacco (radioactive Polonium), so it's possible they could do it to weed too, but I wouldn't be smoking Beasters anyway. You're not going to die from it and you're not going to make it any safer by eating than by smoking, but there's not necessarily anything bad in it. Use it up or give it away and then avoid it if it bothers you. I may be wrong but I thought that only specific heavy-duty fertilizers that a grower used way too much of impart bad things on a plant... most weed is grown with 'good' fertilizers because the quality of the product is more important than the size. Beasters sounds like just the opposite of that theory, so buying it is supporting sleaze.