Talk:Grimm/@comment-26663362-20160208005620/@comment-25396609-20160208010615

By my headcanon you get sick for a couple days, maybe some weird fever dreams. Eating them (which would be incredibly difficult because it would dissolve almost instantly when removed from the body) might permanently fuck with your head, maybe cook your brain a little as a result of prolonged fever

But more than likely nothing in canon for the previously mentioned reason of dissolving into nothing/ceasing to exist. Basically, it's likely the smoke stuff doesn't actually exist, or is whatever material the grimm are made of fading out of existance.