This claim is based on studies that show excess ammonia in the body can combine with alpha-ketoglutarate, reducing problems associated with ammonia toxicity.

Upon adding excess ammonia, the precipitate dissolves, forming a deep blue ammonia complex, Schweizer's reagent:

Astrocytes protect neurons against excitotoxicity by taking up excess ammonia and glutamate.

The aqueous solution consists of acrylonitrile, acetonitrile, hydrocyanic acid, and ammonium sulfate (from excess ammonia).

Dialysis may help rid the body of excess ammonia during extreme illness.

The remaining water, also containing excess ammonia, will evaporate completely, leaving a clean surface.

Hyperammonemia occurs when the body produces excess ammonia.

Upon adding excess ammonia, the precipitate dissolves, forming tetraamminecopper(II):

The nervous system is especially sensitive to the effects of excess ammonia.

Ammonia is especially damaging to the nervous system, and excess ammonia causes neurological problems and other signs and symptoms of carbamoyl phosphate synthetase I deficiency.