I was at Home Depot a few hours ago (I scored a nep and a sarr btw) and I was looking for vermiculite and couldn't find any so I asked this lady that was working in the garden center and she said that it was taken off the market because a part of it has been proven to CAUSE CANCER! Use EXTREM caution with handling any that you might have! Or just get rid of it! I was soooo surprised when I heard! Anyways, when I heard this I INSTANTLY thought to post it on here concidering so many of you use it! I'm glad I didn't buy that one bag a year ago! Apparently vermiculite is associated with asbestos which was all know causes cancer! Anyways, I just thought I'd warn everyone.