Food Grade Diatomaceous Earth - 2 Pound - Non-Toxic Organic, Powder-Safe for Humans, Dogs and Cats 89 - 95% amorphous silica content - Greater silica content means greater effectiveness, and ours is the highest available. Vi-Olivia Food Grade Diatomaceous Earth is the purest available - Not all DE is the same. Cheaper grades of Diatomaceous Earth contain impurities and are less effective. Unconditional, 100% Satisfaction Guarantee - If you're not happy with our Diatomaceous Earth for any reason, we'll fully refund your purchase