Diatomaceous Earth (DE) — is a naturally occurring, soft, chalk-like sedimentary rock that is easily crumbled into a fine white to off-white powder. This is in fact made from diatoms and can be used to destroy mites and other parasites. It literally cuts them to shreds, it can be used externally or internally. But if you use it internally you must be food grade, the stuff they use in pools is not safet to take internally.
Tip of the week.
it can be used externally or internally? ....for what? ...or should I ask?............