http://wholelifestylenutrition.com/natural-solutions/what-is-diatomaceous-earth/
Apparently not even food grade diatomaceous earth is meant for humans to ingest. But it is bad for bugs.
Not true as I’ve had many a glass and am here to tell you about it😁
That is usually good for crawly critters and sails and slugs. It dries up tthir secretions and cuts and scratches them up. Really works with slugs and snails. Its cheap but needs to be replaced after it rains hard. Just pour in circle around plants you want to protect.