Type of Unintended Effect: Genetically Modified Plants Affecting Food and Feed

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Corn (Maize)

Atlantic salmon fed Bt corn had altered enzyme activity in liver and intestine as well as altered proportions and numbers of different white blood cells.

Long-term toxicity of a Roundup herbicide and a Roundup-tolerant genetically modified maize.

GM Maize Differs from Non-GM Maize at Molecular Level In Unintended Ways, Including in Response to Drought Stress

Pea

Peas engineered to be weevil-resistant elicited immune reactions in mice.

Peas engineered to be weevil-resistant had lowered starch digestibility when fed to chickens and pigs.

Potato

Inulin-storing potatoes had higher alkaloid content and pigs fed on them had reduced daily weight gain.

Soy

Glyphosate-resistant GM soybeans differ compositionally from non-GM soybeans and contain high residues of the herbicide glyphosate.

Diet containing glyphosate-resistant soybeans affected the nuclei of liver cells in mice.

Transgenic DNA from glyphosate-resistant soybeans was detected in the intestinal flora of humans.

Plants more generally

International shipments of food and feed are increasingly contaminated with genetically modified (GM) products.