Agaritine is an aromatic hydrazine-derivative mycotoxin in mushroom species of the genus Agaricus.

Agaritine is present as a natural mycotoxin in fresh samples of at least 24 species of the genera Agaricus, Leucoagaricus, and Macrolepiota.

[3] These mushrooms grow in a wide range of habitats; indeed, one species alone, Agaricus bisporus, is cultivated in over 70 countries and on every continent except Antarctica.

[2] Agaritine content (% fresh weight) in raw Agaricus bisporus, for example, ranges from 0.033% to 0.173%, with an average of 0.088%.

[5] The highest amount of agaritine is found in the cap and gills of the fruiting body, and the lowest in the stem.