Controversies of genetically modified foods

Safety

Potential human health impact: allergens, transfer of antibiotic resistance markers, unknown effects Potential environmental impact: unintended transfer of transgenes through cross-pollination, unknown effects on other organisms (e.g., soil microbes), and loss of flora and fauna biodiversity

Access and Intellectual Property

Domination of world food production by a few companies

Increasing dependence on Industralized nations by developing countries

Biopiracy—foreign exploitation of natural resources

Ethics

Violation of natural organisms' intrinsic values

Tampering with nature by mixing genes among species

Objections to consuming animal genes in plants and vice versa

Stress for animal 

Labeling

Not mandatory in some countries (e.g., United States)

Mixing GM crops with non-GM confounds labeling attempts

Society

New advances may be skewed to interests of rich countries