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Is the ammonia dangerous? Or can it be? How much ammonia can a person consume before it becomes dangerous?

Ammonia is a gas at standard temperature and pressure. Unless they are intentionally pumping ammonia gas into the final product there should only be trace amounts. Furthermore it isn't poisonous in small quantities, we have an enzyme that breaks it down.[1]

1: http://en.wikipedia.org/wiki/Carbamoyl_phosphate_synthetase

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