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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.
Ammonia is a product of the metabolism of proteins and other compounds, and it is required for the synthesis of essential cellular compounds. However, a 5- to 10-fold increase in ammonia in the blood induces toxic effects in most animal species, with alterations in the function of the central nervous system. Both acute and chronic hyperammonemia result in alterations of the neurotransmitter system.