Sounds to me like they’re trying to sell product. I’ve heard a lot of those claims but I’ve also heard the opposite about DE I don’t know much about people or animals ingesting it. Read a little bit on it but don’t know enough about it to actually try it or comment on it but For respiratory it is bad to breathe it in a lot. I’ve heard a lot of people say that it helps with worms in chickens but I’ve also heard a lot of people say that that is very untrue. Luckily I’ve never had to worry about worms with my chickens so never had to really look into that