A scientific study that regulators around the world relied on for decades to justify continued approval of glyphosate was quietly retracted last Friday over serious ethical issues including secret authorship by Monsanto employees – raising questions about the pesticide-approval process in the U.S. and globally.

Professor Michael Antoniou, head of the Gene Expression and Therapy Group at King’s College London, describes how regulators are ignoring the health risks of stacked-trait GMOs and the combined toxicity of pesticide mixtures.