"EDIBLE CLAY INTERNAL/EXTERNAL :
"TERRAMIN HEALING CLAY"
From California Earth Minerals
Used for Internal and External Healing
Detoxing from heavy metals
There is also a book available possibly at Amazon.com by Frenchman Raymond Dextreight called "EARTH CURES"
Go to California Earth's website and click on "science" you will read nice useful information
With each order of clay a small flyer will be included for directions and other important info to read.