Just found this forum so I'm a new member. But not new to drug testing, here's my experience. My intake average is a joint a day or more, 7 days a week for the last 30 years and 2 to 3 days before I have to take a drug test I start drinking a couple of 32 oz bottles of Sunne's #7 (volcanic ash) sold at health and natural food stores. I have NEVER tested positive after using Sunne's #7. The only time I ever tested pos was when I could not find any, and all I could use was special tea, as instructed and it did NOT work. As a side note, I have taken over a dozen drug test.