Our bodies can tolerate molds and mycotoxins in small quantities. In larger quantities, they can be a health hazard. Because exposure to mycotoxins is relatively rare, allergic effects are more common than toxic effects.

The health effects of mycotoxin exposure are different from allergic reactions to mold spores. Toxic effects can include flu-like symptoms, respiratory problems, headaches, cognitive problems, and skin irritation. Environmental illnesses can be difficult for healthcare practitioners to diagnose.