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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 levels rise when there are large amounts of protein being catabolized and the liver is unable for some reason to convert it into urea so it can be excreted through the kidneys. anything that interferes with the breakdown of ammonia in the system will increase serum levels. that includes such conditions as: hepatic encephalopathy; hepatic coma