I won't comment on if it works or not, but I want to warn everyone to becareful using it. In it's powdered form it can be very dusty. The dust when breathed in WILL destroy your lung tissue and cause severe damage. Years ago I drove truck for a living and hauled this stuff on occasion from the plant in CA were it is mined from the earth. There is a "pocket" where it became deposited when an area of seabed dried up. It is widely use in a food grade quality for filtering wine, beer, and many other products, among several other uses. The workers in this mine area actually wore self contained oxygen equipment while working in and around the factory and mine due to how dangerous it is if breathed in.