GMO safety testing sits at the center of a scientific dispute over how long feeding studies should run and what their results can actually show. This excerpt begins with Gilles-Éric Séralini’s controversial two-year rat study of Monsanto’s NK603 Roundup-tolerant corn, then examines why its conclusions were challenged over sample size and statistical power.
French and European projects including GMO90+, G-TwYST, and GRACE then test genetically modified corn over longer periods, comparing biological changes with toxicological relevance. The debate shifts from headline claims to experimental design, uncertainty, and interpretation: whether longer studies reveal meaningful effects, and whether regulators should require more than the standard 90-day feeding trials.
Documentary: OGM: Lies and Truth
Director: Frédéric Castaignède
Production: ARTE France & La Compagnie des Taxi-Brousse (2016)
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