The primary aim of this research project is to gather information on the occurrence of Alternaria mycotoxins in various foodstuffs (cereal, tomato and oleiferous products, fruit and vegetable juices, lentils, beer) available on the Belgian market. Additionally, the effect of food processing on the Alternaria toxin levels will be investigated, during the beer production chain and the production of tomato based foodstuffs (juice, sauce and concentrates).