GMOs are fouling organic foodstuffs in Belgium, according to the consumers' association Test-Achats. In a trial carried out by the association, 22 products out of 113 showed traces of GMOs (below the "accidental" threshold of 0.9%). Some of these products were certified as organic.

The trial was carried out in the framework of a survey about Belgian food's quality and safety. Traces of GMOs in ingredients such as maize and soy have been found in foiled products. Nonetheless,
the detected rate in 12 products turned out to be lower than the threshold allowed by the new European regulation. This means that there is no obligation to report it, as the pollution can be considered "accidental".
In seven products a presence was detected of GMOs that are not allowed by the EU. Two organic products showed a rate of allowed GMOs and a conventional product presented more than 0.9% of GMOs without reporting it on the label. With this test, Test-Achats aims at proving that the tolerance thershold of 0.9% is not a "theoretical" limit, as many considered it.