Deoxynivalenol, commonly known as DON or vomitoxin, is a mycotoxin produced by certain molds, particularly Fusarium graminearum. It often contaminates crops like wheat and corn, especially in warm and humid conditions. This toxin can affect both human and animal health, leading to symptoms such as nausea and vomiting. Exposure to deoxynivalenol can occur through the consumption of contaminated food or feed. Regulatory agencies monitor levels of DON in food products to ensure safety. Proper storage and handling of grains can help reduce the risk of contamination and protect public health.