Aflatoxins are a kind of mycotoxin. The primary difference between aflatoxin and mycotoxin is the source. The former is only produced by Aspergillus species, while the latter can be produced by many types of molds. Aflatoxins are the most poisonous mycotoxins which can cause severe health issues in humans and animals, including death. Mycotoxins and Gut Health The gastrointestinal tract (GI tract) is greatly affected by the ingestion of food contaminated by mycotoxins. Normally, the intestinal barrier in the GI tract acts as a filter against mycotoxins. However, some mycotoxins can severely affect the GI tract by altering normal intestinal functions like barrier function and nutrient absorption. Trichothecenes, zearalenone, fumonisins, and ochratoxins are some of the impacts of mycotoxins on gut health. Also read: Mold and Dampness: How Mold Affects Your Health