Wait a second....I posed the same concern to Chickendr Peter Brown, after I had purchased the dewormer from him. I told him I was afraid to use it and didn't want to poison anyone. He told me to wait three weeks, and then resume eating the eggs. Gave me the same warning about not being approved, etc, and then said, and I quote: " I have been selling it for fifteen years, and have never had anyone tell me they experienced any problems". I had to use something more than DE because we had a necropsy done on one of ours, she had several types, except roundworm, which we had previously dewormed for. Because our flock has been exposed to TB, we were told by the State vet to get them as healthy as possible, and deworming was one of the things he recommended. He did not say what to use in his recommendation. ALSO...we have dewormed with Piperazine before (just once)...and ate the eggs two weeks later. No ill effects. I don't recall seeing a warning on the bottle we purchased re consumption of eggs. There are a lot of products recommended for poultry on the market for various things...then you read the small print about the egg issue. For one thing it's a precaution.by the manufacturer. Originally I was horrified when I found this out...then I found by researching that a lot of people use the products anyway. I'm a firm believer in holistic treatment, but sometimes you have to resort to other things.