Diatomaceous Earth (Food Grade) is a very effective natural insecticide and dewormer.

Diatomaceous Earth consists of fossilized remains of diatoms, one-celled plants found in oceans, waterways and soil that once covered significant portions of the earths biomass. This ancient organism is said to give a myriad of health benefits.

A natural pest control option, Diatomaceous Earth kills insects that walk across it without harming mammals. You can sprinkle DE across a surface or animal and it will dehydrate and kill insects that walk on it. 

If ingested diatomaceous earth can help with absorption of calcium and absorb toxins in the stomach.

For more information, read Earth M.D. Blog on Diatomaceous Earth.