I believe that in the US, the FDA classifies it under "GRAS" generally recognized as safe. [ame=http://www.youtube.com/watch?v=Ss_b-dRIOOg]YouTube - Meat Glue Secret‏[/ame]
In college many years ago, we found with the campus cafeteria lacking in excitement, we discovered that we could use the chocolate cake frosing, a little butter, and with a little time we could mix up a nice tasty glue and glue our used dirty dishs and untensils to the underside of the dining table! Once set, it was quite strong! A mind is a terrible thing to waste///