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Quick Answer. A personâs normal ammonia level typically ranges between 15 to 45 micrograms per deciliter. To determine these levels, an ammonia blood test is performed.
High ammonia levels in the bloodstream may signify a problem exists in either the: Ammonia is toxic to the body, but there is always a certain level of ammonia in the bloodstream, as the production of ammonia is a natural bodily function. If, however, for some reason the body is producing excessive amounts of ammonia, and these excessive amounts are not eliminated, high ammonia levels may occur.