Mycotoxins are a group of toxic compounds produced by certain species of molds under suitable environmental conditions. They can contaminate various food products and animal feed. These toxins are an important concern in food safety because some may remain in a product even after the mold stops growing or dies. Furthermore, certain mycotoxins cannot be reliably eliminated through conventional cooking methods. Certain fungal species belonging to genera such as Aspergillus, Penicillium, and Fusarium produce different toxins depending on the species, strain, and surrounding conditions. Well-known examples include aflatoxins, ochratoxin A, fumonisins, and deoxynivalenol. The sources of these toxins vary. Some are associated with maize, grains, and nuts, while others may occur in different food products depending on agricultural practices and harvesting and storage conditions. The ability of molds to grow and produce toxins is affected by temperature, humidity, water availability, the nature of the food substrate, and storage conditions. Storing grains or nuts in warm, humid environments may increase the likelihood of fungal growth, particularly when raw materials are damaged or ventilation is inadequate. However, the presence of mold does not necessarily indicate the presence of a specific toxin, just as the absence of visible fungal growth does not guarantee that food is free of mycotoxins. The health effects of mycotoxins vary according to the type of toxin, the amount of exposure, and its duration. Some aflatoxins are associated with an increased risk of liver cancer following chronic exposure, while other toxins may affect different organs or biological functions. Consequently, risk management depends on preventing contamination as much as possible, monitoring raw materials, and using validated analytical methods to detect toxins when necessary. Fermentation and cooking are not reliable methods for eliminating all mycotoxins. The concentrations of certain toxins may change during processing, but this depends on the compound and the process used. Some microorganisms may help bind or transform specific types of toxins; however, these effects vary, and they should not be relied upon as a substitute for controlling the quality of raw materials. Prevention includes implementing good agricultural and storage practices, drying crops to appropriate moisture levels, minimizing damage to grains and nuts, monitoring storage conditions, and conducting the necessary tests in accordance with food safety standards. Rejecting unacceptably contaminated materials is also an essential component of risk management. The study of mycotoxins highlights the important relationship between microbiology and food safety. It also emphasizes that prevention begins on the farm and throughout the supply chain, rather than being limited to the final stages of food processing. Al-Mustaqbal University – The First University in Iraq