Aflatoxin
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Not to be confused with Alpha toxin.
 
Chemical structure of aflatoxin B1
Aflatoxins are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. The name, aflatoxin, was created around 1960 after the discovery that the source of "Turkey 'X' disease" was Aspergillus flavus toxins.[1] Aflatoxins are toxic and among the most carcinogenic substances known.[2] After entering the body, aflatoxins may be metabolized by the liver to a reactive epoxide intermediate or hydroxylated to become the less harmful aflatoxin M1.