I know of a forum where folks do "cleanses" and some actually use DE every day, or just when they do the cleanse, depends on the person. It is said to be a great dewormer and the organic websites and forums I have read mention with the picking practices we have for our produce, that is not a bad idea to use it.
It doesnt mix very well tho, you really have to throw a bit in somethin where you wont taste it. My birds seem to hate the stuff but I insist and they seem healthy! lol
I only put it in a stew one time my hubby made, where he made curry. Not quite brave enuff to see how it tastes on its own.
To answer you, if I beat around the bush, yea its good for you, if you put on someones head tho, I would be super careful of breathing the dust and of the eyes, cuz its powdered shells and would be extremely irritating so might not be the best solution for the head. It would be great tho for under couch cushions and etc, or cracks and crannies of the house,bed, etc.
Jill