I don't know! But, I read it in the "Culture" Magazine (of South. Calif.) in July. Big print and lots of nice pictures too! Plus, ole Willie on the cover blowin smoke!! Guess it is worth a try, if you need to hide the smell! I just go outside! Who the hell cares what it smells like outside. Of course, I have my mmj req. too! Getting even braver as I age and don't care who is around, so long as it is outside! And if one looks over the fence-will invite in! pr