[BahUnfair]

So that's how they make chicken nuggets! That looks suspiciously like pink ice cream.

So they use ammonia to kill all the nasties. The real issue is whether that ammonia ends up in you in large enough quantities to stress your liver and kidneys. Its not enough to say "dangerous stuff used to kill potentially dangerous microbes in our food" you need to show that enough of it is getting into our bodies to actually be a problem. Ammonia is a natural metabolic waste product so we're well adapted to dealing with it already(by pissing and sweating it out as urea).